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: CHCHMDBEPS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-239 A Leonardtown MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-279 A Waldorf MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-325 A Damascus MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-327 A Gaithersburg MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-336 A Washington Zone 2 MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-596 A Ashton MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-598 A Hughesville MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-610 A Washington Zone 4 MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-622 A La Plata MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-628 A Mechanicsville MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-634 A Ridge MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-635 A Tompkinsville MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-637 A Washington Zone 3 MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-639 A Laurel MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
240-800 A Washington Zone 2 MD 2593 CORE COMMUNICATIONS, INC. - MD 236      
301-789 A Washington Zone 4 MD 3806 CORE COMMUNICATIONS, INC. - PA 236      
571-360 A Independent Hill VA 5832 CORETEL VIRGINIA, LLC - VA 236      
571-380 A Lorton VA 5832 CORETEL VIRGINIA, LLC - VA 236      
571-390 A Nokesville VA 5832 CORETEL VIRGINIA, LLC - VA 236      
571-402 A Dale City VA 5832 CORETEL VIRGINIA, LLC - VA 236      
571-406 A Triangle VA 2593 CORE COMMUNICATIONS, INC. - MD 236      

Last updated: Mon, 24 May 2021 01:28:43 UTC

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