U.S. Federal Regulations

This page formerly contained some of the Federal Communications Commission regulations relating to telephone numbering, excerpted from the Code of Federal Regulations, Title 47, Volume 3, Part 52, Subpart B (pages 52-55), revised as of October 1, 1997. However, those regulations have been amended substantially, so please go directly to the source for the updated version:

Please visit the National Archives Electronic Code of Federal Regulations, eCFR online, or go directly to 47 CFR 52 (B)