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: CMLDMDCH0MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-284 1 Frostburg MD 228C IDT AMERICA, CORP. - MD 240   2006-03-10   
240-362 7 Cumberland MD 228C IDT AMERICA, CORP. - MD 240   2006-10-06   
240-522 0 Cumberland MD 228C IDT AMERICA, CORP. - MD 240   2007-08-03   
240-609 1 Cumberland MD 228C IDT AMERICA, CORP. - MD 240   2016-08-18   
301-264 2 Mount Savage MD 228C IDT AMERICA, CORP. - MD 240   2006-03-10   
301-338 A Cumberland MD 228C IDT AMERICA, CORP. - MD 240      
301-338 2 Cumberland MD 228C IDT AMERICA, CORP. - MD 240   2006-03-25   
301-463 1 Lonaconing MD 228C IDT AMERICA, CORP. - MD 240   2006-03-10   
301-478 1 Flintstone MD 228C IDT AMERICA, CORP. - MD 240   2006-03-10   
301-786 1 McCoole MD 228C IDT AMERICA, CORP. - MD 240   2006-03-10   
304-738 4 Ridgeley WV 317C IDT AMERICA, CORP. - WV 240   2006-03-10   
304-790 8 Keyser WV 317C IDT AMERICA, CORP. - WV 240   2006-03-10   
814-747 3 State Line PA 213C IDT AMERICA, CORP. - PA 240   2006-03-10   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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