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: HGTWMD53DS0

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-799 A Keedysville MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
301-857 A Clear Spring MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
301-882 A New Market MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
304-821 A Inwood WV 5833 CORETEL WEST VIRGINIA, INC. - WV 240      
667-364 2 Stevensville MD 568G PEERLESS NETWORK OF MARYLAND, LLC 242   2018-11-20   
667-766 9 Stevensville MD 568G PEERLESS NETWORK OF MARYLAND, LLC 242   2024-03-22   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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