Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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NPA: 256 [Rate centres in NPA 256] [Dial plan for NPA 256]

NXX: 866

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
256-866 A Killen AL HNVIALUNXAZ  553J WHITESKY COMMUNICATIONS, LLC 477      
256-866 0 Killen AL   145J TERRA NOVA TELECOM INC. 477   2024-02-15   
256-866 1 Killen AL HNVIALUNXAZ  553J WHITESKY COMMUNICATIONS, LLC 477   2021-05-02   
256-866 2 Killen AL HNVIALUNXCZ  506J TWILIO INTERNATIONAL, INC. 477   2021-06-01   
256-866 3 Killen AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2021-07-30   
256-866 4 Killen AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2021-07-30   
256-866 5 Killen AL HNVIALUNX2Z  624H ONVOY SPECTRUM, LLC 477   2022-02-19   
256-866 6 Killen AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2022-03-24   
256-866 7 Killen AL HNVIALUNX2Z  624H ONVOY SPECTRUM, LLC 477   2022-02-19   
256-866 8 Killen AL HNVIALUNX2Z  624H ONVOY SPECTRUM, LLC 477   2021-10-27   
256-866 9 Killen AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2023-10-13   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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