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: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
256-257 A Falkville AL HNVIALUNX6X  604E ONVOY, LLC - AL 477      
256-257 0 Falkville AL   604E ONVOY, LLC - AL 477   2019-03-11   
256-257 1 Falkville AL   073H TELNYX LLC 477   2020-05-01   
256-257 2 Falkville AL   5562 METROPCS, INC. 477   2016-05-06   
256-257 3 Falkville AL   072F BANDWIDTH.COM CLEC, LLC - AL 477   2024-08-07   
256-257 4 Falkville AL   604E ONVOY, LLC - AL 477   2021-07-30   
256-257 5 Falkville AL   604E ONVOY, LLC - AL 477   2021-09-16   
256-257 6 Falkville AL   5562 METROPCS, INC. 477   2022-01-08   
256-257 7 Falkville AL   5255 LEVEL 3 COMMUNICATIONS, LLC - AL 477   2013-10-11   
256-257 8 Falkville AL   604E ONVOY, LLC - AL 477   2019-03-11   
256-257 9 Falkville AL   073H TELNYX LLC 477   2021-10-30   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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