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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: HGTWMD53DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-212 A Oakland MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-225 A Frederick MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-231 A Hagerstown MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-251 A Highfield MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-275 A Grantsville MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-287 A Hancock MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-322 A McCoole MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-323 A Emmitsburg MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-369 A Mount Airy MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-378 A Cumberland MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-647 A Clear Spring MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-648 A Keedysville MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-649 A Smithsburg MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-664 A Cumberland MD 568G PEERLESS NETWORK OF MARYLAND, LLC 240      
240-679 A Friendsville MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
240-680 A Frederick MD 568G PEERLESS NETWORK OF MARYLAND, LLC 240      
240-693 A Walkersville MD 568G PEERLESS NETWORK OF MARYLAND, LLC 240      
240-829 A Emmitsburg MD 469J CORETEL MARYLAND, INC. - MD 240      
240-850 A Hagerstown MD 568G PEERLESS NETWORK OF MARYLAND, LLC 240      
240-860 A Cumberland MD 568G PEERLESS NETWORK OF MARYLAND, LLC 240      
301-750 A Friendsville MD 2593 CORE COMMUNICATIONS, INC.- MD 240      
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      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.