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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 256 [Rate centres in NPA 256] [Dial plan for NPA 256]

NXX: 987

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
256-987 A Grayson AL HNVIALUNX6X  604E ONVOY, LLC - AL 477      
256-987 0 Grayson AL HNVIALUNX0X  5255 LEVEL 3 COMMUNICATIONS, LLC - AL 477   2021-11-15   
256-987 1 Grayson AL   792K CHARTER IP ENABLED SERVICES, LLC 477   2023-05-28   
256-987 3 Grayson AL   476F CORETEL ALABAMA, INC. - AL 477   2021-11-06   
256-987 5 Grayson AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2021-04-15   
256-987 6 Grayson AL HNVIALUNX6X  604E ONVOY, LLC - AL 477   2021-04-15   
256-987 8 Grayson AL HNVIALUNX2Z  624H ONVOY SPECTRUM, LLC 477   2024-12-12   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.