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.

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
703-579 2 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2004-03-01   
703-579 3 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2004-03-01   
703-662 A Dulles VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-662 2 Dulles VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-663 3 Washington Zone 17 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2004-05-08   
703-663 5 Washington Zone 17 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2005-10-10   
703-713 8 Washington Zone 19 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2013-11-01   
703-825 A Braddock VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-825 2 Braddock VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-872 4 Washington Zone 8 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-885 A Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-885 0 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-885 1 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-885 2 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-885 3 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-885 4 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-885 5 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-885 6 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-885 7 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-885 9 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-889 4 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2005-11-11   
703-982 A Lorton VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-982 9 Lorton VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2004-06-21   
703-986 A Dale City VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-986 2 Dale City VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2004-07-01   
703-987 2 Occoquan VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2004-07-01   
771-203 A Washington Zone 1 DC 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
771-203 6 Washington Zone 1 DC 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2022-04-05   

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Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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