U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 47Chapter IPart 52Subpart B - Subpart B—Administration
§ 52.7 - Definitions.
§ 52.9 - General requirements.
§ 52.11 - North American Numbering Council.
§ 52.12 - North American Numbering Plan Administrator and B&C Agent.
§ 52.13 - North American Numbering Plan Administrator.
§ 52.15 - Central office code administration.
§ 52.16 - Billing and Collection Agent.
§ 52.17 - Costs of number administration.
§ 52.19 - Area code relief.
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