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: HNVIAL964MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
256-620 A Cullman AL 7421 AT&T - LOCAL 477      
256-620 9 Cullman AL 7421 AT&T - LOCAL 477   2004-01-01   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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