Title 18 › Part PART II— - CRIMINAL PROCEDURE › Chapter CHAPTER 206— - PEN REGISTERS AND TRAP AND TRACE DEVICES › § 3123
A court can order the use of a pen register or trap-and-trace device without telling the person being investigated if a government lawyer says the info is likely helpful in an ongoing criminal case. Federal investigators can get orders that work anywhere in the United States. State investigators can get orders that work only inside the court’s area. The order applies to any phone or internet company whose help is needed. If a company is served but not named, it can ask for written proof that the order covers it. If law enforcement puts its own device on a public provider’s packet-switched network, it must keep a log showing who installed and accessed the device, when it was installed and removed, how it was set up, and what it collected. That log must be given, under seal and without notice, to the issuing court within 30 days after the order ends. Each order must identify the line or account and the suspected person if known, say what kinds of communications it covers, name the crime involved, and can require the provider to help install the device. Orders last up to 60 days and can be extended for another 60 days only with a new court finding. Orders must be sealed and the provider must not 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
Apr 6, 2026
Release point: 119-73