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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OCN: 7421 AT&T - LOCAL

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
985-360 A Houma LA NWORLAMAYBX  490      
985-360 4 Houma LA NWORLAMAYBX  490   2004-01-26   
985-520 3 Hammond LA NWORLAMAYBX  490   2004-01-26   
985-635 3 Covington LA NWORLAMAYBX  490   2002-11-27   
986-212 A Emmett ID BOISIDMAXWY  652      
986-212 9 Emmett ID BOISIDMAXWY  652   2021-12-23   
986-272 A Nu Acres ID BOISIDMAXZY  652   2024-02-22   
986-272 9 Nu Acres ID   652   2024-02-22   
989-492 A Midland MI SGNWMIFAXMD  344      
989-492 9 Midland MI SGNWMIFAXMD  344      

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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