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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OCN: 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
667-343 6 Cambridge MD   242      
667-343 7 Cambridge MD   242      
667-343 8 Cambridge MD   242      
667-343 9 Cambridge MD   242      
667-727 3 Sudlersville MD ESTNMDES5MD  242      
667-786 7 Columbia MD BLTOMDKHDS0  238      

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Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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