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: 227 [Rate centres in NPA 227] [Dial plan for NPA 227]

NXX: 294

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-294 A Washington Zone 13 MD   876D ONVOY, LLC - MD 236   2025-12-26   
227-294 0 Washington Zone 13 MD   876D ONVOY, LLC - MD 236   2025-12-26   
227-294 1 Washington Zone 13 MD   876D ONVOY, LLC - MD 236   2025-12-26   
227-294 2 Washington Zone 13 MD   876D ONVOY, LLC - MD 236   2025-12-26   

Last updated: Sat, 15 Nov 2025 03:38:44 UTC

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