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

<< 1 2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
571-566 2 Washington Zone 19 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2021-02-25   
571-566 3 Washington Zone 19 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2021-02-25   
571-566 4 Washington Zone 19 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2021-02-25   
571-566 5 Washington Zone 19 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2021-02-25   
571-566 6 Washington Zone 19 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2021-02-25   
571-566 7 Washington Zone 19 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2021-02-25   
571-566 8 Washington Zone 19 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2021-02-25   
571-566 9 Washington Zone 19 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2021-02-25   
571-766 A Washington Zone 17 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
571-766 7 Washington Zone 17 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2007-10-26   
571-766 9 Washington Zone 17 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2008-05-05   
571-814 4 Washington Zone 8 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2010-12-20   
571-882 5 Washington Zone 8 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-08-17   
571-882 6 Washington Zone 8 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-08-17   
571-882 7 Washington Zone 8 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-08-17   
571-882 8 Washington Zone 8 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-08-17   
703-949 A Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
703-949 2 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2011-02-16   
703-949 3 Herndon VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2011-02-16   
703-992 1 Washington Zone 17 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2004-04-16   
703-992 2 Washington Zone 17 VA 7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2004-04-16   

<< 1 2

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.