Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 256 [Rate centres in NPA 256] [Dial plan for NPA 256]

NXX: 670

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
256-670 A Bridgeport AL CHTGTNNSXFY  072F BANDWIDTH.COM CLEC, LLC - AL 472      
256-670 0 Bridgeport AL   072F BANDWIDTH.COM CLEC, LLC - AL 472   2014-03-13   
256-670 1 Bridgeport AL   604E ONVOY, LLC - AL 472   2016-04-18   
256-670 2 Bridgeport AL   604E ONVOY, LLC - AL 472   2016-04-18   
256-670 3 Bridgeport AL   604E ONVOY, LLC - AL 472   2017-05-29   
256-670 4 Bridgeport AL   604E ONVOY, LLC - AL 472   2017-05-29   
256-670 5 Bridgeport AL   5255 LEVEL 3 COMMUNICATIONS, LLC - AL 472   2019-03-10   
256-670 6 Bridgeport AL   145J TERRA NOVA TELECOM INC. 472   2025-11-22   
256-670 7 Bridgeport AL   508J CENTURYLINK COMMUNICATIONS, LLC 472   2014-05-06   
256-670 8 Bridgeport AL   073H TELNYX LLC 472   2020-04-15   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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