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: WASHDCDTDS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
202-644 A Washington Zone 1 DC 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
202-649 A Washington Zone 1 DC 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
202-813 A Washington Zone 1 DC 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
240-237 A Lexington Park-Great Mills MD 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
240-533 A Washington Zone 3 MD 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
240-690 A Gaithersburg MD 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
240-748 A Washington Zone 3 MD 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-225 A Washington Zone 14 MD 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-547 A Washington Zone 2 MD 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-677 A Washington Zone 14 MD 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-823 A Washington Zone 13 MD 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-828 A Washington Zone 2 MD 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-832 A Washington Zone 4 MD 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-833 A Washington Zone 14 MD 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
571-227 A Washington Zone 8 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
571-303 A Washington Zone 8 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
571-354 A Washington Zone 19 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
571-391 A Washington Zone 19 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
571-476 A Washington Zone 19 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
571-566 A Washington Zone 19 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
571-766 A Washington Zone 17 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-949 A Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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