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: 276

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
220-276 A Marietta OH CLMBOHLT1MD  464C ONVOY, LLC - OH 324   2025-05-10   
220-276 0 Marietta OH CLMBOHLT1MD  464C ONVOY, LLC - OH 324   2025-05-10   
220-276 1 Marietta OH CLMBOHLT1MD  464C ONVOY, LLC - OH 324   2025-05-12   
220-276 8 Marietta OH CLMBOHLT1MD  464C ONVOY, LLC - OH 324   2026-04-04   
220-276 9 Marietta OH CLMBOHLT1MD  464C ONVOY, LLC - OH 324   2026-05-31   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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