FCC Spectrum Management & Radio Licensing

The electromagnetic spectrum — the range of radio frequencies used for wireless communication — is public property managed by the federal government. The FCC does not sell spectrum; it grants licenses to use specific frequency bands for specific purposes, for limited periods, in the public interest. Every broadcast station, cell tower, satellite, WiFi router (through equipment certification), amateur radio operator, and commercial wireless carrier depends on this licensing system. The Communications Act of 1934 (see FCC Telecommunications Regulation) established the framework still in use today: the federal government maintains ultimate control over all radio channels; private parties may use them only under FCC license; no license confers ownership of a frequency. See Broadband / Net Neutrality for related FCC internet regulation.

Current Law (2026)

Legal Authority

• 47 U.S.C. § 301 — Federal control of spectrum: Congress maintains control of all radio channels; no license creates ownership of any frequency; licenses are grants of use, not property rights
• 47 U.S.C. § 303 — FCC powers: classify stations; prescribe nature of service; assign frequency bands; establish areas of service; regulate technical standards; prevent interference; prescribe qualifications of operators
• 47 U.S.C. § 307 — License grants: FCC grants licenses if public convenience, interest, or necessity will be served; when demand exceeds spectrum, FCC may consider geographic distribution and other public interest factors
• 47 U.S.C. § 309 — Application process: FCC examines applications; any party claiming the grant would not serve the public interest may file a petition to deny; the public interest standard allows FCC to weigh diversity, localism, competition, and public need
• 47 U.S.C. § 310 — License ownership restrictions: no foreign government may hold a license; foreign individual ownership of broadcast stations limited to 20%; FCC may waive 25% limit for parent company foreign ownership when public interest is served
• 47 U.S.C. § 312 — Revocation: FCC may revoke for false statements in applications, willful violations, failure to operate as required, national security grounds, or on request of DOD; licenses may not be revoked without an opportunity for hearing
• 47 U.S.C. § 336 — Digital TV transition: established framework for FCC to issue digital television licenses and recover analog spectrum; led to the completed DTV transition and freeing of spectrum for other uses
• 47 U.S.C. § 337 — Public safety spectrum: FCC required to allocate spectrum in the 746–806 MHz band for public safety services; commercial licenses in this band paired with public safety obligations

How Spectrum Management Works

The spectrum is divided into bands by frequency, each with different propagation characteristics and suitable uses. Lower frequencies travel farther and penetrate buildings better (AM radio at 540-1700 kHz, cellular at 600-900 MHz); higher frequencies carry more data but shorter distances (WiFi at 2.4 and 5 GHz, 5G millimeter wave at 24+ GHz). The FCC, in coordination with the National Telecommunications and Information Administration (NTIA) for federal government use, allocates specific bands for specific services.

Commercial spectrum is licensed through competitive bidding (spectrum auctions) introduced in 1994. Rather than comparative hearings, the FCC now auctions licenses for commercial wireless services. Bidders win the right to use specific frequencies in specific geographic areas for a term of years (typically 10 years, renewable). The FCC has raised over $200 billion through spectrum auctions — more than any other government asset sale program.

Broadcast licenses (TV and radio) are not auctioned — they're granted through a public interest review. Broadcasters apply, FCC reviews whether the public interest would be served, and licenses are granted for 8 years. Renewals are typically granted if the station has served the public interest and complied with FCC rules. License challenges and petitions to deny create public participation in broadcast licensing.

Amateur (ham) radio is a unique class of licensed spectrum use. The FCC licenses individual operators (not specific frequencies) in three classes: Technician, General, and Amateur Extra, each granting access to more frequency bands. Ham radio operators may not receive compensation for their communications — it's explicitly a non-commercial service. In emergencies, ham radio operators provide backup communications when commercial infrastructure fails.

Unlicensed use through equipment certification: Consumer devices like WiFi routers, Bluetooth devices, and cordless phones operate on unlicensed spectrum bands (the "industrial, scientific, and medical" bands). Manufacturers must obtain FCC equipment authorization showing the device won't cause harmful interference; individual users don't need licenses.

How It Affects You

If you're a broadcaster (TV or radio station owner), your FCC license is your most valuable business asset — and it expires. The renewal process requires demonstrating that you've served the public interest, complied with FCC rules, and operated in the community's interest. Complaints filed against your station during the license term are considered at renewal. The public interest standard includes programming requirements, public file maintenance, and equal employment opportunity compliance.

If you're a cell carrier or wireless internet provider, your spectrum licenses define your network capacity. FCC spectrum auctions are where you compete for the frequencies needed for 5G deployment. Winning spectrum licenses can cost tens of billions of dollars for major carriers — these costs ultimately flow through to consumer prices and service quality.

If you're a small wireless business, rural ISP, or regional carrier: Secondary market spectrum transactions — buying or leasing licenses from primary holders — are a practical alternative to auction participation. The FCC's Universal Licensing System (ULS) database at fcc.gov/uls shows all license holders, coverage areas, and expiration dates. Search ULS for underutilized licenses in your target area and approach the holder about an assignment or lease; rural spectrum opportunities exist where large primary licensees hold spectrum they're not actively using. The FCC has streamlined approval for secondary market transactions, and BEAD Program buildout requirements are creating additional pressure on licensees to use or trade their rural allocations.

If you're an amateur radio operator: Your FCC ham license is valid for 10 years and is renewable (Technician, General, and Amateur Extra all use the same 10-year term). The license is tied to your name, not your equipment. Operating without a license on licensed amateur frequencies (or on frequencies you're not authorized for under your license class) is a federal violation with fines up to $10,000 per violation. Your callsign and license details are in the FCC ULS database; search your own record periodically to verify your license shows active and current.

If you're a business deploying wireless devices (RFID, IoT sensors, industrial telemetry, remote controls, private LTE): Before deployment, confirm whether your operating frequency requires a license. Part 15 covers most consumer devices in unlicensed ISM bands (2.4 GHz, 5 GHz, 900 MHz); Part 90 covers licensed land mobile radio for business dispatch and remote monitoring. Operating on licensed spectrum without authorization can result in FCC enforcement action, fines, and mandatory shutdown — including interference complaints from licensed operators who will escalate to the FCC. Check the device's FCC ID at fcc.gov/oet/ea/fccid to confirm what frequencies it's certified for before deployment.

State Variations

Spectrum management is exclusively federal — the FCC preempts state authority over radio frequency allocation and licensing. States may regulate the physical deployment of towers and antennas (zoning, local approvals) but not the spectrum itself. State wireless E911 programs work with federally designated 911 spectrum under federal standards.

Implementing Regulations

• 47 CFR 1.9010-1.9047 — Spectrum leasing arrangements (de facto control standard, spectrum manager leasing, contractual requirements, and special provisions for Citizens Broadband Radio Service and supplemental satellite coverage)

• 47 CFR Part 2 — Frequency allocations and radio treaty matters (general allocation rules, technical standards, equipment authorization)

• 47 CFR Part 25 — Satellite communications (licensing, technical standards, orbital debris mitigation for satellite broadband systems)

• 47 CFR Part 95 — Personal Radio Services (225 sections across 13 subparts — the rules for unlicensed and lightly licensed radio services available to the general public without engineering expertise, covering walkie-talkies, CB radios, medical telemetry, personal locator beacons, and automotive radar):

  • Subpart B — Family Radio Service (FRS) (15s): no license required; handheld radios on 22 FRS channels in the 462/467 MHz band; maximum 2W ERP on most channels; radios must be type-accepted (FCC equipment authorization); fixed antennas prohibited — all FRS radios must be handheld; channels 1-14 shared with GMRS (GMRS users may use higher power on shared channels); FRS designed for family short-range communication — typical range 0.5–2 miles in suburban environments; no age or citizenship requirement
  • Subpart D — CB Radio Service (23s): no license required; 40 channels on 27 MHz band; maximum 4W AM or 12W SSB; Channel 9 designated for emergency communications and highway traveler assistance; Channel 19 conventional highway trucking channel (not designated, but de facto); linear amplifiers ("power boosters") are prohibited — a common violation that the FCC enforces selectively; antennas may be base-loaded or center-loaded whip; CB range typically 3-20 miles depending on terrain and antenna; operators may use "handles" (pseudonyms) but must use assigned callsign (or "KX+4 digits" format for unlicensed stations) on request
  • Subpart E — General Mobile Radio Service (GMRS) (21s): individual license required ($35, 10-year term) — one license covers immediate family members; operates on 30 GMRS frequencies in 462/467 MHz band (overlapping FRS on channels 1-14); maximum 50W on dedicated GMRS frequencies; repeater operation permitted (extends range to 20-50 miles); GMRS is the only personal radio service that allows repeaters and higher power for extended range; popular with preparedness communities and rural families; cannot be used for commercial purposes
  • Subpart H — Wireless Medical Telemetry Service (WMTS) (15s): licensed to healthcare facilities for transmitting patient physiological data (ECG, oxygen saturation, blood pressure) wirelessly within hospital environments; operates on three frequency bands (608-614 MHz, 1395-1400 MHz, 1429-1432 MHz); coordination through AAMI (Association for the Advancement of Medical Instrumentation) database; telemetry devices must register with WMTS coordinator before use; interference from other devices in hospital environments has been a significant safety issue
  • Subpart I — Medical Device Radio Communications Service (27s): covers implanted and body-worn medical devices (pacemakers, neurostimulators, insulin pumps, glucose monitors) that communicate wirelessly; operates in the MICS (Medical Implant Communications Service) band (402-405 MHz); MedRadio Band (413-419 MHz, 426-432 MHz, 438-444 MHz, 451-457 MHz); short-range, low-power transmissions for device programming and monitoring; requires FCC equipment authorization; subject to general interference rules
  • Subpart K — Personal Locator Beacons (PLBs) and Maritime Survivor Locating Devices (10s): PLBs transmit on 406 MHz to the COSPAS-SARSAT satellite search-and-rescue system when manually activated; 406 MHz signal includes a unique registration code linked to the owner's identity and emergency contacts in NOAA's database; PLBs must be registered with NOAA before use; 121.5 MHz homing signal assists rescuers once within range; maritime survivor locating devices (MSLDs) operate on AIS frequency for short-range location; activation of a PLB triggers a SAR response — accidental activations must be immediately reported to NOAA to prevent unnecessary rescue operations

• 47 CFR Part 96 — Citizens Broadband Radio Service (CBRS) (34 sections — the FCC's framework for shared use of the 3550–3700 MHz band, which created a three-tier spectrum sharing model that powers private 5G networks, enterprise wireless systems, and rural broadband deployments; Part 96 is the regulatory foundation for the $20+ billion CBRS ecosystem that has emerged since full commercial launch in 2020):

  • § 96.11 — Frequencies: the CBRS band covers 3550–3700 MHz (150 MHz total); the lower 100 MHz (3550–3650) may be accessed by all three user tiers; the upper 50 MHz (3650–3700) was formerly the 3650 MHz grandfathered band and has transitional rules; the band is particularly valuable for private 5G because it supports both wide-area deployments and dense indoor coverage
  • Three-tier sharing model — Part 96 created spectrum sharing without exclusive geographic licenses across the entire band: (1) Incumbent Users (federal government, Navy radar, satellite earth stations) — highest protection tier; all other users must protect them; (2) Priority Access Licensees (PALs) — hold geographic 10 MHz licensed channels auctioned by the FCC; up to 7 PALs per county-area; have priority over GAA but must protect incumbents; (3) General Authorized Access (GAA) — no license required; use the band on a non-interfering basis in frequencies not assigned to PALs; most private CBRS networks deploy under GAA, which is effectively a licensed-by-rule framework
  • § 96.25 — PAL rights and protections: a PAL holder has interference protection from other PAL users and all GAA users within its licensed geographic area and channel; no protection from incumbent interference; PALs are county-based licenses auctioned in 10 MHz channels; maximum of 4 PAL channels may be aggregated by a single entity; PALs last 3 years and are renewable; the 2020 CBRS auction (Auction 105) raised approximately $4.6 billion for 20,625 licenses
  • § 96.35 — GAA use: GAA users may operate on any frequency not assigned to a PAL or needed by an incumbent; the Spectrum Access System (SAS) dynamically assigns available frequencies to GAA devices; because PALs cover only a fraction of all geographic areas and frequencies, the vast majority of CBRS deployments operate under GAA without any license fee or application
  • § 96.53 / § 96.57 — Spectrum Access System (SAS): the entire CBRS framework depends on one or more SAS administrators — FCC-designated entities operating automated databases that register all CBRS devices, track PAL assignments, protect incumbent users, and dynamically assign frequencies in real time; all CBRS devices (CBSDs) must register with an SAS and receive frequency authorization before transmitting; the SAS is the technological innovation that makes three-tier sharing workable — it replaces the static frequency coordination of traditional licensing with real-time automated management; FCC has designated multiple SAS administrators (including Google, Commscope/Federated Wireless, and Amdocs)
  • § 96.67 — Environmental Sensing Capability (ESC): the ESC sensor network detects signals from federal incumbent users (particularly Navy shipborne radars that move between ports and operational areas) and notifies the SAS to protect them; ESC sensors are deployed along the U.S. coastline; when an ESC sensor detects an incumbent signal, the SAS immediately reassigns or suspends CBRS operations in the affected area; the ESC is the mechanism for protecting mobile, unpredictable federal incumbents that cannot simply be geofenced
  • § 96.43 / § 96.45 — CBSD categories: Category A CBSDs are lower-power devices — indoor-mounted or outdoor-mounted below 6 meters height above average terrain (HAAT); self-coordination is allowed for Category A; Category B CBSDs are higher-power outdoor installations (cell towers, outdoor small cells) and must be professionally installed with FCC-certified installers; Category B devices have wider coverage area and higher interference potential, requiring more rigorous SAS coordination

  The CBRS framework was the FCC's first successful implementation of large-scale dynamic spectrum sharing — demonstrating that complex multi-tier coexistence could work at commercial scale. The band now supports approximately 8 million+ CBRS devices as of 2026, with particularly strong adoption for: private LTE/5G networks (hospitals, warehouses, manufacturing facilities, campuses — enterprises deploy CBRS for dedicated wireless networks without dependence on public carrier infrastructure); fixed wireless broadband (rural ISPs using CBRS for last-mile broadband in areas where licensed spectrum is cost-prohibitive); and 4G/5G small cell densification by mobile carriers supplementing their macro networks. The 3.5 GHz frequency range was chosen partly because it supports both wide-area and dense indoor coverage — making it uniquely suitable for the enterprise and industrial IoT use cases that CBRS now predominantly serves.

• 47 CFR Part 30 — Upper Microwave Flexible Use Service (UMFUS): the FCC's regulatory framework for the millimeter wave spectrum bands used in 5G deployments — specifically the 28 GHz (27.5–28.35 GHz), 37 GHz (37–38.6 GHz), 39 GHz (38.6–40 GHz), and 47 GHz (47.2–48.2 GHz) bands. Created by the FCC's Spectrum Frontiers proceeding (December 2016), Part 30 established flexible use licensing for high-frequency spectrum that was previously either unallocated or used for niche point-to-point microwave systems. Key provisions:

  • § 30.1 — Creation and scope: the UMFUS framework consolidated legacy Local Multipoint Distribution Service (LMDS) licenses in the 28 GHz band and licenses in the 28 GHz band under the new UMFUS framework effective December 14, 2016; the Part 30 designation reflects a deliberate policy choice to allow "flexible use" — licensees can deploy any technology (5G NR, fixed wireless, backhaul, IoT) without FCC approval, as long as they meet the technical rules; this flexibility is essential because mm-wave 5G technology evolves rapidly
  • § 30.103 — License term: 10 years from initial issuance or renewal; shorter than the 15-year term for some sub-6 GHz bands, reflecting the expectation that mm-wave technology will evolve faster
  • § 30.104 — Performance (buildout) requirements: UMFUS licensees must make buildout showings at renewal — they must demonstrate that they have provided service to a meaningful portion of the license area; for the county-based licenses in the 28, 37, and 39 GHz bands, the buildout standard requires providing service to at least 40% of the population in the license area (or 75% with a waiver program) by the end of the initial 10-year term; the 37 GHz (Lower) band uses a different framework — it is divided between licensed use (37.0–37.6 GHz) and federal/non-federal shared use (37.6–38.6 GHz)
  • § 30.105 — Geographic partitioning and spectrum disaggregation: licensees may partition a license geographically (sell a portion of the county-based license to another entity) or disaggregate the spectrum (sell a portion of the frequency block while retaining the rest of the geographic area); this secondary market flexibility enables spectrum to flow to the highest-value use — rural ISPs, utilities, municipalities, and enterprises may acquire partitioned or disaggregated UMFUS spectrum to build dedicated networks
  • § 30.202 — Power limits: strict power limits apply to prevent interference between adjacent geographic licensees; for fixed and base stations, maximum EIRP is 75 dBm for the 28 GHz band; mobile devices are subject to lower limits; the high power limits reflect the physics of mm-wave propagation — signals attenuate rapidly over distance and through buildings, so higher transmit power is needed to achieve viable coverage ranges (typically hundreds of meters for outdoor 5G mm-wave small cells, not the miles achieved with sub-6 GHz)
  • § 30.204 — Power Flux Density (PFD) limits: in addition to EIRP limits, the rules impose geographic PFD limits — the signal power density at the boundary of an adjacent licensee's area must not exceed specified levels; this creates a coordinated interference environment between adjacent county licensees without requiring case-by-case coordination agreements
  • § 30.205 — Federal coordination: licensees in the 37–38 GHz range must coordinate with federal spectrum users through the NTIA; certain geographic areas near federal installations have coordination zone requirements; federal radar and satellite earth station operations receive protection from commercial UMFUS deployments; the Lower 37 GHz band (37.0–37.6 GHz) is shared between federal (primarily DoD) and non-federal users under a co-primary allocation, making coordination obligations more significant

  Context: the FCC auctioned UMFUS licenses in Auction 101 (28 GHz, 2018) and Auction 102 (24 GHz, which uses 47 CFR Part 25 for the 24 GHz band — adjacent to UMFUS), raising nearly $3 billion total. The major winners were AT&T, T-Mobile, and Verizon, which use mm-wave 5G spectrum for ultra-dense urban deployments — the same carrier towers that advertise "5G Ultra Wideband" or "5G mmWave" are using spectrum licensed under Part 30. The physics of mm-wave propagation (high bandwidth, short range, easily blocked by rain, glass, and walls) means that Part 30 spectrum is best suited for dense urban environments and indoor coverage scenarios — not the wide-area rural broadband coverage that lower-frequency 5G bands provide.

• 47 CFR Part 18 — Industrial, Scientific, and Medical Equipment (22 sections — the FCC's rules governing the ISM bands: the unlicensed spectrum frequencies where industrial, scientific, and medical equipment may operate without a communications license, provided they accept interference and don't cause harmful interference to licensed services; the ISM framework enables microwave ovens, WiFi, Bluetooth, and industrial heating equipment to coexist with licensed radio services):

  • § 18.107 — ISM band definitions: ISM equipment operates intentionally on specific frequencies designated for non-communications use — including: 6.765–6.795 MHz, 13.553–13.567 MHz, 27.12 ± 0.6 MHz (used for industrial diathermy and some RFID), 40.66–40.70 MHz, 433.05–434.79 MHz (European ISM, limited U.S. use), 902–928 MHz (widely used for IoT, RFID, wireless sensors), 2400–2500 MHz (2.4 GHz — the most heavily used ISM band, shared by microwave ovens, WiFi, Bluetooth, and ZigBee), 5725–5875 MHz (5.8 GHz — used by WiFi 802.11a/n/ac/ax and cordless phones), and 24 GHz (automotive radar, short-range radar)
  • § 18.109 — General technical requirements: ISM equipment must be designed with sufficient shielding and filtering to limit spurious emissions outside the ISM band; the "good engineering practice" standard means that ISM equipment manufacturers must ensure their devices do not emit significant radio energy outside the designated band; the FCC's equipment authorization process (testing, labeling, and FCC ID) is the primary mechanism for ensuring compliance before market entry
  • § 18.111 — No frequency protection rights: operators of ISM equipment "shall not be deemed to have any vested or recognizable right to the continued use of any given frequency" — ISM spectrum users accept interference from other ISM users and from licensed services that hold secondary protection rights in these bands; this is the fundamental trade-off of unlicensed operation: freedom from licensing in exchange for no interference protection
  • § 18.115 — Elimination of harmful interference: if ISM equipment causes harmful interference to a licensed radio service, the operator must promptly correct the problem; the FCC may order ISM equipment to cease operations entirely if interference cannot be resolved; this authority is rarely exercised but establishes that unlicensed ISM operation is subject to displacement by licensed users

  The practical significance of Part 18 is the 2.4 GHz and 5.8 GHz ISM bands — the spectrum that powers virtually all consumer WiFi, Bluetooth, and wireless LAN deployments. The 2.4 GHz band's crowding (WiFi 802.11b/g/n, Bluetooth 5.x, ZigBee, microwaves, baby monitors, and countless IoT devices sharing 83 MHz of spectrum) drove the development of 5 GHz WiFi as an alternative; the 6 GHz band was added for WiFi 6E (802.11ax) through a 2020 FCC rulemaking under Part 15 (unlicensed devices) rather than Part 18 (ISM). The ISM designation and Part 18 framework predate WiFi and Bluetooth — these technologies emerged as lucky beneficiaries of spectrum originally designated for industrial heating, microwave processing, and medical diathermy equipment.

• 47 CFR Part 15 — Radio Frequency Devices (106 sections — the FCC's rules governing all intentional, unintentional, and incidental radiators that operate without an individual station license; Part 15 is the legal foundation for consumer electronics, WiFi, Bluetooth, RFID, garage door openers, key fobs, IoT sensors, and virtually every wireless consumer product sold in the United States):

  • § 15.1 — Scope: Part 15 governs three device categories: intentional radiators (devices designed to emit radio frequency energy for communications, e.g., WiFi routers, Bluetooth headsets, cordless phones, remote controls); unintentional radiators (devices that emit RF energy as a byproduct of their operation, e.g., computers, monitors, switching power supplies, cable TV equipment); and incidental radiators (devices where RF emission is not inherent to operation, e.g., electric motors, fluorescent lighting); the common thread is that none require an individual license — they must instead comply with technical limits and equipment authorization procedures
  • § 15.101 — Equipment authorization for unintentional radiators: Class B digital devices (equipment marketed for use in a residential environment — home computers, printers, routers, smart TVs) must obtain FCC authorization via Declaration of Conformity (DoC), a self-certification supported by accredited laboratory testing; Class A digital devices (equipment marketed for use in a commercial, industrial, or business environment — office servers, industrial controllers) face less stringent emission limits but are still subject to self-verification; all digital devices must display the FCC's compliance statement
  • § 15.201 — Equipment authorization for intentional radiators: devices that intentionally transmit radio energy (WiFi chips, Bluetooth modules, cellular radios, RFID readers) require FCC Certification — a third-party review by an FCC-recognized Telecommunication Certification Body (TCB); upon certification, the device receives an FCC ID (a unique alphanumeric identifier combining the grantee code and product code); the FCC ID must be permanently affixed to the device or displayed electronically on-screen for devices too small for a label
  • §§ 15.205–15.209 — Emission limits for unintentional radiators (Subpart B): radiated emission limits apply at specified distances (3 meters for Class B, 10 meters for Class A) across the frequency spectrum; limits are tighter below 1 GHz and in bands near radio astronomy, aeronautical radionavigation, and federal assignments; the limits are expressed in µV/m (microvolts per meter) and increase with frequency; conducted emission limits also apply for interference via power lines
  • §§ 15.247–15.255 — Spread spectrum and intentional radiators (Subpart C): most unlicensed wireless technologies operate under § 15.247 (the 900 MHz, 2.4 GHz, and 5.8 GHz bands) or § 15.249 (the 49 MHz band for baby monitors and low-power remotes); § 15.247 requires either direct sequence spread spectrum (DSSS), frequency hopping spread spectrum (FHSS), or digital modulation with a minimum 500 kHz occupied bandwidth; maximum transmit power is 1 watt EIRP (or 4 watts for point-to-point bridging); the 802.11 WiFi and Bluetooth standards were both designed to comply with § 15.247's spread-spectrum requirements
  • §§ 15.501–15.525 — Ultra-Wideband (Subpart F): UWB devices (which spread RF energy over a bandwidth of at least 500 MHz or 20% of the center frequency) may operate in the 3.1–10.6 GHz range under strict emission masks; UWB applications include precision indoor positioning (Apple AirTag, Samsung SmartTag use UWB for centimeter-level accuracy), ground-penetrating radar for utility locating, and through-wall imaging for law enforcement; the FCC authorized UWB in 2002 (67 FR 34844) after extensive analysis of its interference potential to GPS, aviation, and cellular — UWB's spread power spectral density is so low that individual UWB pulses register below the noise floor of most narrowband receivers
  • §§ 15.701–15.717 — White Space Devices (Subpart H): TV band White Space Devices (WSDs) operate in unused TV broadcast channels (channels 2–36 in the 54–608 MHz band); WSDs must consult an FCC-approved geolocation database before transmitting to determine which channels are available at their location without interfering with licensed TV stations, wireless microphones, or cable headends; the database checks protect both analog cable systems and unlicensed wireless microphones used in live entertainment; WSDs can transmit up to 4 watts EIRP outdoors (1 watt indoors) — enough for rural broadband links covering several kilometers; the technology has been deployed in rural areas as a lower-cost alternative to licensed spectrum

  The 2020 6 GHz Order (85 FR 43590) was the most significant Part 15 expansion since WiFi: the FCC opened the entire 5.925–7.125 GHz band (1,200 MHz of spectrum) for unlicensed use, enabling WiFi 6E (802.11ax) to operate in previously licensed microwave backhaul and cable TV bands; the new rules allow standard-power devices (up to 36 dBm EIRP outdoors — much higher power than prior Part 15 limits) and low-power indoor-only devices, with automated frequency coordination (AFC) systems protecting incumbent fixed and satellite earth station licensees from outdoor standard-power devices. WiFi 6E devices must query an AFC database before transmitting — an architecture adapted from the White Space database model.

  Recent rulemakings: 85 FR 43590 (July 2020) — 6 GHz band opened for unlicensed use; 88 FR 26044 (April 2023) — 60 GHz band (57–71 GHz, Part 15 Subpart G) limits updated; 88 FR 73122 (October 2023) — 5.9 GHz band reconfiguration (lower 45 MHz allocated to unlicensed, upper portion retained for DSRC/V2X).

• 47 CFR Part 17 — Construction, Marking, and Lighting of Antenna Structures (18 sections — the FCC's tower safety rules requiring owners of antenna structures that may pose a hazard to aircraft to register their structures, mark them with paint, and light them with the specific lighting prescribed by the FAA; Part 17 is the FCC companion to FAA's 14 CFR Part 77 obstruction notice requirements):

  • § 17.4 — Antenna structure registration: any antenna structure (a structure constructed or used to transmit radio energy) that requires FAA notification under 14 CFR Part 77 must also register with the FCC's Antenna Structure Registration (ASR) system; the ASR database is publicly searchable and contains the location, height, and lighting specifications for every registered antenna structure; the FCC-assigned registration number must be displayed on the structure and used in all FCC filings involving the antenna
  • § 17.21 — When marking and lighting are required: antenna structures must be painted and/or lighted when (a) FAA requires marking or lighting as a condition of a determination of no hazard, or (b) the structure has been determined by the FAA to constitute an obstruction to air navigation; the FCC does not independently determine obstruction status — it relies entirely on the FAA's aeronautical study findings from 14 CFR Part 77 proceedings
  • § 17.23 — Specifications: unless the FCC specifies otherwise, each registered antenna structure must be painted and lighted in accordance with the current FAA Advisory Circular for antenna structures (AC 70/7460-1); marking typically means alternating bands of aviation orange and white paint; lighting options include steady white (daytime), red (nighttime), and high-intensity white strobes; medium-intensity white strobes (required for many towers since the 2016 FCC/FAA coordination) are the most common form because they provide good visibility without the community nuisance of high-intensity strobes visible from miles away
  • § 17.47–17.49 — Monitoring and record-keeping: the owner must regularly inspect the lights (at least daily or through an automatic monitoring system) and maintain records of inspections in a station log; if lights fail, § 17.48 requires immediate notification to the FAA (by telephone or electronic means) so that NOTAM (Notice to Airmen) can be issued warning pilots; failure to maintain proper lighting is an FCC enforcement violation; NOTAM issuance after light failure is also FAA-required — the dual notification obligations reflect the joint FCC/FAA authority over antenna structure safety

  The FCC's Part 17 and the FAA's Part 77 are closely integrated: the FAA determines whether a structure is an obstruction and what marking/lighting is required; the FCC enforces the obligation and registers the structure. There are approximately 100,000 antenna structures registered in the FCC ASR database — broadcast towers, cell towers, microwave relay towers, and utility towers. The most visible controversy in recent years involves low-intensity red lights vs. white strobe lights: communities near towers object to steady red lights (visible all night year-round) while aviation safety advocates argue strobe-triggered-only systems (which only activate when aircraft-detection radar senses nearby traffic) adequately protect aviation while reducing nuisance lighting.

• 47 CFR Part 13 — Commercial Radio Operators (17 sections — the FCC's licensing framework for operators of commercial radio stations who must hold FCC-issued operator licenses; distinct from station licensing because operator licenses are personal credentials — they authorize the holder to operate radio equipment, maintain transmitters, and supervise unlicensed persons making adjustments):

  Commercial radio operator licenses are required for: merchant marine officers responsible for ship radio (GMDSS — Global Maritime Distress and Safety System); broadcast station chief engineers; aviation radio service operators on some frequencies; and other licensed services where the FCC requires a licensed operator to be responsible for transmitter operation. License types include: Marine Radio Operator Permit, Restricted Radiotelephone Operator Permit (required for operation of most aircraft radios in international service), General Radiotelephone Operator License (for broadcast and maritime), First-Class Radiotelegraph Operator Certificate (now rare), and GMDSS Radio Operator License.

  Key provisions: § 13.15 — commercial radio operator licenses are normally valid for the lifetime of the holder, with no renewal required; the Restricted Radiotelephone Operator Permit is the most commonly issued license — required for aircraft radio operators on international routes and for some commercial communications operations; qualification requires passing a written examination administered by Commercial Operator License Examination Managers (COLEMs) — FCC-designated private organizations that administer and grade the examinations; the FCC does not administer examinations directly. COLEMs include organizations like GLAAB, W5YI Group, and others designated under Part 13. § 13.19 — the licensed operator may permit unlicensed persons to adjust a transmitter in the operator's presence, and may delegate supervision responsibilities to unlicensed persons under the operator's direct supervision.

• 47 CFR Part 88 — Uncrewed Aircraft System Services (21 sections — the FCC's technical rules governing radio spectrum for command-and-control links and other communications for Uncrewed Aircraft Systems (UAS); specifically governs the 5030–5091 MHz band designated by the International Telecommunication Union for aeronautical radionavigation and UAS command links):

  The 5030–5091 MHz band is the internationally coordinated spectrum for UAS command-and-control links — the radio channels used by pilots to control drones beyond line of sight and for critical safety communications. Part 88 establishes the technical standards (incorporating RTCA DO-362A, the industry standard for aeronautical UAS communications) including: transmitter power limits; emission bandwidth (61 MHz occupancy); time division duplex (TDD) frame structure; and equipment certification requirements. All transmitters operating in this band must be certified by the FCC and must notify the FAA when applying for certification.

  The practical significance: Part 88 supports Beyond Visual Line of Sight (BVLOS) drone operations — the category that enables package delivery (Amazon Prime Air, UPS Flight Forward), agricultural monitoring, and infrastructure inspection at scale. Without dedicated certified spectrum for command-and-control links, BVLOS operations cannot be conducted safely. The FCC created Part 88 in 2024 (89 FR 3654) to establish the technical framework before large-scale BVLOS operations ramp up. The rules coordinate with FAA UAS requirements (14 CFR Part 107) and BVLOS waiver conditions. Recent rulemakings: 89 FR 3654 (January 2024) — Part 88 created; 89 FR 33012 (April 2024) — technical corrections.

• 47 CFR Part 26 — Space Launch Services (15 sections — the FCC's spectrum framework for radio communications during space launch operations):

  The FCC designated three frequency bands for space launch telemetry, telecommand, and tracking: 2025–2110 MHz (ground-to-launch-vehicle telecommand only — uplink commands to the rocket); 2200–2290 MHz (tracking, telemetry, and command in both directions); and 2360–2395 MHz (fixed, base, itinerant, and mobile stations supporting launch operations). All three bands are licensed on a non-exclusive, nationwide basis — meaning a single license authorizes operations across the country rather than in a specific geographic area (§ 26.103). License terms are 10 years (§ 26.102).

  The licensing structure differs from most FCC services: applicants obtain a non-exclusive nationwide license first, then register individual launch sites, launch vehicles, and ground stations under that umbrella license. A designated space launch frequency coordinator manages day-to-day frequency assignments — stations may only operate after the coordinator clears them to avoid interference with other users sharing the band (§ 26.107). The bands are shared with other services (notably, 2025–2110 MHz is also used for Electronic News Gathering (ENG) and multichannel video distribution), so coordination is essential.

  Eligible licensees are non-federal entities that conduct space launch operations — primarily commercial launch companies such as SpaceX, Rocket Lab, United Launch Alliance, Firefly, and Blue Origin — as well as their parents and subsidiaries (§ 26.101). FAA notification is required when applying for FCC equipment certification in these bands (the FAA is the primary licensing authority for the launch operations themselves under 14 CFR Part 460). A 2025 rulemaking (90 FR 11492, March 2025) updated technical standards and coordination procedures as commercial launch frequency has accelerated. With SpaceX conducting 100+ Falcon 9 and Starship launches annually, the spectrum coordination burden has grown dramatically from when these rules were first written.

• 47 CFR Part 101 — Fixed Microwave Services (99 sections — the FCC's licensing and technical framework for point-to-point and point-to-multipoint microwave radio links in bands above 1 GHz; these licensed fixed-site microwave systems provide the dedicated wireless backhaul used by cellular carriers, utilities, broadcasters, railroads, and enterprises to transmit high-capacity data between specific fixed locations):

  • § 101.101 — Frequency availability: Part 101 organizes microwave spectrum across numerous bands; common carrier bands include 6 GHz (5925–6875 MHz) for traditional telephone backhaul, 11 GHz (10.7–11.7 GHz) for urban backhaul, 18 GHz (17.7–19.7 GHz) for high-capacity short hops, and 23 GHz (21.2–23.6 GHz) for ultra-capacity urban links; private operational fixed services (utilities, pipelines, enterprises) use adjacent allocations; the E-band 70/80/90 GHz (Subpart Q) is lightly licensed for extreme-capacity, short-distance links used for 5G small cell backhaul
  • § 101.103 — Frequency coordination: applicants for new microwave links must submit a frequency coordination study demonstrating no harmful interference to existing operations within the coordination distance; accredited private frequency coordinators conduct the studies and notify potentially affected licensees; coordination is the practical gatekeeper for microwave spectrum in dense urban environments where dozens of operators share the same frequency bands
  • §§ 101.105, 101.111, 101.113 — Interference protection and power limits: licensed microwave stations receive geographic protection; emission spectral masks (§ 101.111) and transmit power limits (§ 101.113, typically 25–1000 watts EIRP) bound interference footprint; directional antennas (§ 101.115) focus energy toward the intended receiver; antenna performance standards (front-to-back ratio, sidelobe suppression) are specified per band
  • Subpart L — LMDS (Local Multipoint Distribution Service): covers the 28 GHz (27.5–28.35 GHz) and 31 GHz bands licensed as Basic Trading Areas for fixed wireless broadband; now in demand for 5G millimeter-wave fixed wireless access and enterprise backhaul; LMDS licenses require "substantial service" construction (§ 101.1011) within the license term
  • Subpart P — MVDDS (12.2–12.7 GHz): Multichannel Video Distribution and Data Service, sharing spectrum with Direct Broadcast Satellite (DBS) operations; MVDDS operators provide fixed wireless broadband or video while maintaining interference levels below thresholds protective of satellite TV reception; the 12 GHz band is actively contested for 5G use, with FCC weighing whether to add mobile operations
  • Subpart Q — 70/80/90 GHz E-band: lightly licensed links using online self-coordination via a registry database (operators register link endpoints, registry checks for conflicts); used for multi-gigabit 5G mmWave small cell backhaul and data center interconnects; rain attenuation limits practical range to under 1 mile in most climates, but multi-gigabit capacity makes E-band the highest-throughput per-channel microwave option available

  Fixed microwave services are the invisible infrastructure supporting everything visible in wireless networks — when a cell tower sends data to the internet, the signal often travels via a licensed Part 101 microwave backhaul link. AT&T, Verizon, and T-Mobile hold thousands of Part 101 licenses for cellular backhaul. The 6 GHz bands used by Part 101 incumbent operators face ongoing pressure from the FCC's 2020 Wi-Fi 6E rulemaking, which opened lower 6 GHz for unlicensed use — those outdoor devices must use AFC databases to protect Part 101 incumbents. Recent rulemakings: 89 FR 33259 (April 2024) — updated E-band antenna performance standards; 88 FR 77220 (November 2023) — streamlined microwave license renewal.

Pending Legislation

No major structural changes pending as of 2026. The BEAD Program (Broadband, Equity, Access, and Deployment) from the Infrastructure Investment and Jobs Act (2021) directs $42.5 billion for broadband deployment, including in spectrum-underserved areas. Ongoing debate continues about whether and how to repack broadcast spectrum to free additional frequencies for 5G use.

Recent Developments

The FCC has been deploying 5G spectrum through auctions in the C-band (3.7–3.98 GHz) and millimeter wave bands. The BEAD Program is driving buildout requirements in rural areas. FirstNet (First Responder Network Authority), built on the 700 MHz Band 14 spectrum allocated for public safety, achieved nationwide coverage and is now the primary communications network for first responders. The FCC has also focused on spectrum coexistence issues as 5G deployments near existing aviation altimeter systems have required coordination between the FAA and FCC.

• FCC spectrum auction authority restored (2025): Congress allowed the FCC's spectrum auction authority to lapse in March 2023 — the first time since auctions began in 1994 that the FCC lacked authority to auction new spectrum. The OBBBA (2025 reconciliation package) included a provision restoring FCC auction authority through 2034 and directing the FCC to auction mid-band spectrum in the 3.1-3.45 GHz range. The restoration unlocks billions in projected auction revenue and enables the next wave of 5G mid-band deployments that require auctioned spectrum.
• Salt Typhoon hack and telecom security rules: The Chinese state-sponsored Salt Typhoon hack — which breached AT&T, Verizon, T-Mobile, and other carriers' core networks — prompted the FCC to issue emergency rules strengthening CALEA (Communications Assistance for Law Enforcement Act) cybersecurity requirements. The FCC's order requires carriers to implement cybersecurity risk management plans certified by a senior executive. The Salt Typhoon breach accessed call records and real-time intercepts of approximately 100 senior U.S. government officials and political figures.
• Chinese telecom equipment removal: The FCC's "rip and replace" program — requiring rural carriers to remove Huawei and ZTE equipment and replace it with trusted vendor alternatives — has been severely underfunded. Congress appropriated $1.9 billion but NTIA estimated the actual cost at $4.98 billion. Hundreds of rural carriers remain partially stuck with untrusted equipment they cannot afford to replace. The FCC certified $656M in Phase 1 reimbursements; a funding gap of $3+ billion remains unaddressed.
• AI and spectrum management: The FCC and NTIA are exploring AI-assisted spectrum management — using machine learning to optimize spectrum sharing between licensed users, unlicensed devices, and government users in congested bands. The 6 GHz band (where consumer Wi-Fi 6E operates alongside incumbent microwave users) has been a test case for automated frequency coordination. NTIA's spectrum sharing framework for the lower 3 GHz band (3.1-3.45 GHz) to be auctioned under restored FCC authority contemplates AI-enabled sharing with federal radar systems.
• Modernizing spectrum sharing for satellite broadband (April 2026): The FCC proposed modernizing spectrum sharing rules to accommodate the rapid growth of satellite broadband constellations (LEO satellites), addressing interference management and more efficient spectrum utilization between terrestrial and space-based services.
• Lower C-Band petitions for reconsideration (April 2026): The Wireless Telecommunications Bureau refreshed the record on lower C-Band petitions for reconsideration, continuing the multi-year proceeding to reallocate C-Band spectrum for 5G deployment while protecting satellite operations.