Title 18 › PART II — CRIMINAL PROCEDURE › CHAPTER 206 — PEN REGISTERS AND TRAP AND TRACE DEVICES › § 3123
Allows a government lawyer or a state law officer to get a court order, without the other side present, to install and use a pen register or trap-and-trace device. A federal lawyer can get such an order for use anywhere in the United States. A state officer can get one only inside the court’s area. The court must grant the order if the lawyer or officer certifies the information is likely relevant to an ongoing criminal investigation. The order applies to any company or person who provides phone or electronic service and whose help is needed. If someone not named in the order is served, they can ask for written proof that the order applies to them. If law enforcement puts its own device on a public packet-switched network, the agency must keep a record of who installed or accessed it, dates and times of installation, access, and removal, the device’s settings and any collected information. If possible, that record must be kept electronically. That record must be given to the issuing court, sealed and without notice, within 30 days after the order ends. The order must list known identities, the communications or numbers covered, the crime involved, and can require technical help to install the device. Each order lasts up to 60 days and can be extended for up to 60 more days with another court finding. The order must be sealed, and people who must help cannot tell the subscriber or others about the device or the investigation unless the court allows it.
Full Legal Text
Crimes and Criminal Procedure, Source: USLM XML via OLRC
Legislative History
Reference
Citation
18 U.S.C. § 3123
Title 18, Crimes and Criminal Procedure
Last Updated
Sep 22, 2026
Release point: 119-110