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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Switch: FRDRMDFRXVX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-588 A Grantsville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 240      
240-588 3 Grantsville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 240   2018-05-01   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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