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: 220 [Rate centres in NPA 220] [Dial plan for NPA 220]

NXX: 678

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
220-678 A Somerset OH CLMBOH1169Z  7421 AT&T - LOCAL 324      
220-678 0 Somerset OH   515J IP HORIZON LLC 324   2024-04-29   
220-678 1 Somerset OH   515J IP HORIZON LLC 324   2024-04-29   
220-678 9 Somerset OH CLMBOH1169Z  7421 AT&T - LOCAL 324   2022-10-07   

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

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