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: 221

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-221 A Smithsburg MD HGTWMD539MD  939H COMMIO, LLC 240   2024-01-25   
227-221 0 Smithsburg MD HGTWMD539MD  939H COMMIO, LLC 240   2024-01-25   
227-221 1 Smithsburg MD HGTWMD539MD  939H COMMIO, LLC 240   2024-01-25   
227-221 2 Smithsburg MD HGTWMD539MD  939H COMMIO, LLC 240   2024-01-25   
227-221 3 Smithsburg MD HGTWMD539MD  939H COMMIO, LLC 240   2024-01-25   
227-221 4 Smithsburg MD HGTWMD539MD  939H COMMIO, LLC 240   2024-01-25   

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

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