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Full 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).

 

Document History

  1. ATIS 0300119(2024-03)

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    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines

    • Most Recent
  2. ATIS 0300119(2023-09)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines

    • Historical Version
  3. ATIS 0300119(2023-06)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines

    • Historical Version
  4. ATIS 0300119(2023-04)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines

    • Historical Version
  5. ATIS 0300119(2023-03)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines

    • Historical Version
  6. ATIS 0300119(2022-07)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines

    • Historical Version
  7. ATIS 0300119(2022-04)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines

    • Historical Version
  8. ATIS 0300119(2021-09)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines (TBCOCAG)

    • Historical Version
  9. ATIS 0300119(2021-01)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Assignment Guidelines (TBCOCAG)

    • Historical Version
  10. ATIS 0300119(2021-07)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Assignment Guidelines (TBCOCAG)

    • Historical Version
  11. ATIS 0300119(2021-01)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Assignment Guidelines (TBCOCAG)

    • Historical Version
  12. ATIS 0300119(2020-11)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines (TBCOCAG)

    • Historical Version
  13. ATIS 0300119(2020-07)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines

    • Historical Version
  14. ATIS 0300119(2020-06)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines (TBCOCAG)

    • Historical Version
  15. ATIS 0300119(2020-03)


    Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines (TBCOCAG)

    • Historical Version
  16. ATIS 0300119(2019-10)


    Thousands-Block Number (NXX-X) Pooling Administration Guidelines (TBPAG)

    • Historical Version
  17. ATIS 0300051(2019-05)


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  18. ATIS 0300066(2019-05)


    Thousands-Block Number (NXX-X) Pooling Administration Guidelines (TBPAG)

    • Historical Version
  19. ATIS 0300051(2019-04)


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  20. ATIS 0300066(2019-04)


    Thousands-Block Number (NXX-X) Pooling Administration Guidelines

    • Historical Version
  21. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  22. ATIS 0300066


    Thousands-Block Number (NXX-X) Pooling Administration Guidelines

    • Historical Version
  23. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  24. ATIS 0300066


    Thousands-Block Number (NXX-X) Pooling Administration Guidelines

    • Historical Version
  25. ATIS 0300066


    Thousands-Block Number (NXX-X) Pooling Administration Guidelines

    • Historical Version
  26. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  27. ATIS 0300066


    Thousands-Block Number (NXX-X) Pooling Administration Guidelines

    • Historical Version
  28. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  29. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  30. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  31. ATIS 0300066


    Thousands-Block Number (NXX-X) Pooling Administration Guidelines

    • Historical Version
  32. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  33. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  34. ATIS 0300066


    Thousands-Block Number (NXX-X) Pooling Administration Guidelines

    • Historical Version
  35. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  36. ATIS 0300066


    Thousands-Block Number (NXX-X) Pooling Administration Guidelines

    • Historical Version
  37. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  38. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  39. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  40. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  41. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  42. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  43. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  44. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  45. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  46. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  47. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  48. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  49. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  50. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  51. ATIS 0300051


    Central Office Code (NXX) Assignment Guidelines (COCAG)

    • Historical Version
  52. ATIS 0300051


    CENTRAL OFFICE CODE (NXX) ASSIGNMENT GUIDELINES (COCAG)

    • Historical Version
  53. ATIS 0300051


    CENTRAL OFFICE CODE (NXX) ASSIGNMENT GUIDELINES (COCAG)

    • Historical Version
  54. ATIS 0300051


    CENTRAL OFFICE CODE (NXX) ASSIGNMENT GUIDELINES (COCAG)

    • Historical Version
  55. ATIS 0300051


    CENTRAL OFFICE CODE (NXX) ASSIGNMENT GUIDELINES (COCAG)

    • Historical Version