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: 666

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
256-666 A Huntsville AL HNVIALUNX6X  604E ONVOY, LLC - AL 477      
256-666 0 Huntsville AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2015-12-25   
256-666 1 Huntsville AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2016-06-17   
256-666 2 Huntsville AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2016-06-17   
256-666 3 Huntsville AL HNVIALUNXIX  072F BANDWIDTH.COM CLEC, LLC - AL 477   2016-07-16   
256-666 4 Huntsville AL HNVIALUNXIX  072F BANDWIDTH.COM CLEC, LLC - AL 477   2016-07-16   
256-666 5 Huntsville AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2017-03-12   
256-666 6 Huntsville AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2015-12-25   
256-666 7 Huntsville AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2017-03-12   
256-666 8 Huntsville AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2015-12-25   
256-666 9 Huntsville AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2015-12-25   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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