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ATIS 0300054(2014-09)
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About This Item
Full Description
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.
Document History
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ATIS 0300119(2024-03)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines- Most Recent
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ATIS 0300119(2023-09)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines- Historical Version
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ATIS 0300119(2023-06)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines- Historical Version
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ATIS 0300119(2023-04)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines- Historical Version
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ATIS 0300119(2023-03)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines- Historical Version
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ATIS 0300119(2022-07)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines- Historical Version
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ATIS 0300119(2022-04)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines- Historical Version
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ATIS 0300119(2021-09)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines (TBCOCAG)- Historical Version
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ATIS 0300119(2021-01)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Assignment Guidelines (TBCOCAG)- Historical Version
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ATIS 0300119(2021-07)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Assignment Guidelines (TBCOCAG)- Historical Version
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ATIS 0300119(2021-01)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Assignment Guidelines (TBCOCAG)- Historical Version
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ATIS 0300119(2020-11)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines (TBCOCAG)- Historical Version
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ATIS 0300119(2020-07)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines- Historical Version
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ATIS 0300119(2020-06)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines (TBCOCAG)- Historical Version
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ATIS 0300119(2020-03)
Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines (TBCOCAG)- Historical Version
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ATIS 0300119(2019-10)
Thousands-Block Number (NXX-X) Pooling Administration Guidelines (TBPAG)- Historical Version
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ATIS 0300051(2019-05)
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300066(2019-05)
Thousands-Block Number (NXX-X) Pooling Administration Guidelines (TBPAG)- Historical Version
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ATIS 0300051(2019-04)
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300066(2019-04)
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300066
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
-
ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300066
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
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ATIS 0300066
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300066
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300066
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
-
ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300066
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300066
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
viewing
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
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ATIS 0300051
CENTRAL OFFICE CODE (NXX) ASSIGNMENT GUIDELINES (COCAG)- Historical Version
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ATIS 0300051
CENTRAL OFFICE CODE (NXX) ASSIGNMENT GUIDELINES (COCAG)- Historical Version
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ATIS 0300051
CENTRAL OFFICE CODE (NXX) ASSIGNMENT GUIDELINES (COCAG)- Historical Version
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ATIS 0300051
CENTRAL OFFICE CODE (NXX) ASSIGNMENT GUIDELINES (COCAG)- Historical Version