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ATIS-0300051

Central Office Code (NXX) Assignment Guidelines (COCAG)

This document specifies guidelines for the assignment of central office (CO) codes. Examples of uses for CO codes (NXX) for which these guidelines apply include plain old telephone service (POTS), Centrex, Direct Inward Dialing (DID), cellular mobile service, pagers, data lines, facsimile, coin phones, and customer owned pay phones. While these guidelines were developed at the direction of the FCC, they do not supersede controlling appropriate NANP Area governmental or regulatory principles, procedures and requirements.

CONTENT PROVIDER
Alliance For Telecommunications Industry Solutions [atis]

Included in Packages
This standard is not included in any packages.
Document History
Revises:
  • ATIS-0300051 (Jan 2013)
Amendments & Corrections
We have no amendments or corrections for this standard.