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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Switch: BYRNMIBYRSA

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
810-266 A Byron MI 9323 MICHIGAN BELL TEL CO 340      
810-266 4 Byron MI 9323 MICHIGAN BELL TEL CO 340      
810-266 5 Byron MI 9323 MICHIGAN BELL TEL CO 340      
810-266 6 Byron MI 9323 MICHIGAN BELL TEL CO 340      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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