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About This Item
Full Description
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)
viewing
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
-
ATIS 0300066
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
-
ATIS 0300066
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
-
ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
-
ATIS 0300066
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
-
ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
-
ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
-
ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
-
ATIS 0300066
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
-
ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
-
ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
-
ATIS 0300066
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
-
ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- Historical Version
-
ATIS 0300066
Thousands-Block Number (NXX-X) Pooling Administration Guidelines- Historical Version
-
ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- 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
-
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
-
ATIS 0300051
Central Office Code (NXX) Assignment Guidelines (COCAG)- 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 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