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ATIS-0300119(2025-03), Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines. uploaded

  • 1.  ATIS-0300119(2025-03), Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines. uploaded

    Posted 02-28-2025 12:40:00 PM
    Document Name: ATIS-0300119(2025-03), Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines.
    Description
    This document specifies guidelines for the administration and assignment of
    Central Office (CO) Codes (NPA-NXX) and Thousands-Blocks (NPA-NXX-Xs) to
    Local Number Portability (LNP)-capable Service Provider (SPs) within
    geographic numbering plan areas (NPAs).
    Download Latest Revision
    Submitter: Kayla Goldfarb
    Technical Contact: Kayla Goldfarb
    Group: INC - Industry Numbering Committee
    Folder: Working Documents
    Date submitted: 2025-02-28 17:40:02


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