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: CMLDMDCM5MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-310 A Hagerstown MD 4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
240-321 A Oakland MD 4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
240-807 A Cumberland MD 4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-268 A Cumberland MD 4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-491 A Hagerstown MD 4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-616 A Oakland MD 4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-707 A Cumberland MD 4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
301-988 A Hagerstown MD 4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
304-582 A Martinsburg WV 6284 UNITED STATES CELLULAR - WV 240      
304-671 A Martinsburg WV 6284 UNITED STATES CELLULAR - WV 240      
304-676 A Martinsburg WV 6284 UNITED STATES CELLULAR - WV 240      
304-702 A Martinsburg WV 6284 UNITED STATES CELLULAR - WV 240      
304-813 A Keyser WV 6284 UNITED STATES CELLULAR - WV 240      
681-620 A Keyser WV 6284 UNITED STATES CELLULAR - WV 240      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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