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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.
Published
Mar 24, 2025
Effective
Mar 25, 2026
Citation
90 FR 13416
Agencies
1
Full text not available in our database.
View on Federal Register →Get a plain-English explanation of what this regulation does, which agencies are responsible, and how it affects existing rules.
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CG Docket No. 17-59
FCC 25-15
FR ID 285031
47 CFR 64