U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 47Chapter IPart 52Subpart C - Subpart C—Number Portability
§ 52.20 - Thousands-block number pooling.
§ 52.21 - Definitions.
§ 52.23 - Deployment of long-term database methods for number portability by LECs.
§ 52.25 - Database architecture and administration.
§ 52.26 - NANC Recommendations on Local Number Portability Administration.
§ 52.31 - Deployment of long-term database methods for number portability by CMRS providers.
§ 52.32 - Allocation of the shared costs of long-term number portability.
§ 52.33 - Recovery of carrier-specific costs directly related to providing long-term number portability.
§ 52.34 - Obligations regarding local number porting to and from interconnected VoIP or Internet-based TRS providers.
§ 52.35 - Porting Intervals.
§ 52.36 - Standard data fields for simple port order processing.
§ 52.37 - Number Portability Requirements for Wireless Providers.
§§ 52.38-52.99 - §[Reserved]
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