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: CMLDMDCMTMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-537 A Hagerstown MD 361H ATLANTECH ONLINE, INC. - MD 240      
240-537 0 Hagerstown MD 361H ATLANTECH ONLINE, INC. - MD 240   2017-11-17   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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