Home / Agencies / FCC / 2025-04811
Final Rule

Advanced Methods To Target and Eliminate Unlawful Robocalls

Agency
FCC
Document Number
2025-04811
Published
March 24, 2025
Effective Date
March 25, 2026

Abstract

In this document, the Federal Communications Commission (Commission) modifies its existing call blocking rules. Specifically, the Commission requires all domestic voice service providers to block based on a reasonable do-not-originate (DNO) list. Second, it requires voice service providers to return Session Initiation Protocol (SIP) code 603+ when calls are blocked based on reasonable analytics.

Federal Register Source

This document is published by the Office of the Federal Register, National Archives and Records Administration. Access the full regulatory text, preamble, and docket comments below.

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Frequently Asked Questions

What is the 2025-04811 Federal Register document?
Document 2025-04811 is a Final Rule published by the Federal Communications Commission in the Federal Register on March 24, 2025, with an effective date of March 25, 2026. In this document, the Federal Communications Commission (Commission) modifies its existing call blocking rules. Specifically, the Commission requires all domestic voice service providers to block based on a reasonable do-not-originate (DNO) list. Second, it requires voice service providers to return Session Initiation Protocol (SIP) code 603+ when calls are blocked based on reasonable analytics. View the original at https://www.federalregister.gov/documents/2025/03/24/2025-04811/advanced-methods-to-target-and-eliminate-unlawful-robocalls.
Is document 2025-04811 an economically significant rule?
No. Document 2025-04811 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.

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