Contents

   Subpart A—Scope and Authority
   § 52.1   Basis and purpose.
   § 52.3   General.
   § 52.5   Definitions.

   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.

   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.
   § § 52.37-52.99   [Reserved]

   Subpart D—Toll Free Numbers
   § 52.101   General definitions.
   § 52.103   Lag times.
   § 52.105   Warehousing.
   § 52.107   Hoarding.
   § 52.109   Permanent cap on number reservations.
   § 52.111   Toll free number assignment.

   Subpart E—Universal Dialing Code for National Suicide Prevention and
   Mental Health Crisis Hotline System
   § 52.200   Designation of 988 for a National Suicide Prevention and
   Mental Health Crisis Hotline.
   Appendix to Part 52—Deployment Schedule for Long-Term Database Methods
   for Local Number Portability