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: 273

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
220-273 A Sedalia OH WOTNOHEHCMD  7421 AT&T - LOCAL 324   2024-12-20   
220-273 9 Sedalia OH WOTNOHEHCMD  7421 AT&T - LOCAL 324   2024-12-20   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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