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: WASHDCMTX7X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
202-469 7 Washington Zone 1 DC 2695 CTC COMMUNICATIONS CORP. - DC 236   2008-08-01   
202-499 1 Washington Zone 1 DC 2695 CTC COMMUNICATIONS CORP. - DC 236   2011-05-12   
202-536 A Washington Zone 1 DC 2695 CTC COMMUNICATIONS CORP. - DC 236      
202-536 1 Washington Zone 1 DC 2695 CTC COMMUNICATIONS CORP. - DC 236   2005-07-31   
202-803 4 Washington Zone 1 DC 2695 CTC COMMUNICATIONS CORP. - DC 236   2012-01-09   
202-844 A Washington Zone 1 DC 2695 CTC COMMUNICATIONS CORP. - DC 236      
202-844 1 Washington Zone 1 DC 2695 CTC COMMUNICATIONS CORP. - DC 236   2015-07-16   
202-844 2 Washington Zone 1 DC 2695 CTC COMMUNICATIONS CORP. - DC 236   2015-07-16   
202-844 6 Washington Zone 1 DC 2695 CTC COMMUNICATIONS CORP. - DC 236   2015-07-11   
202-909 1 Washington Zone 1 DC 2695 CTC COMMUNICATIONS CORP. - DC 236   2013-06-20   
240-242 6 Washington Zone 11 MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2006-09-07   
240-245 1 Washington Zone 14 MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2006-01-14   
240-449 1 Gaithersburg MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2005-09-03   
240-619 1 Washington Zone 5 MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2006-01-14   
301-269 8 Washington Zone 2 MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2015-06-29   
301-372 5 Washington Zone 16 MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2016-06-17   
301-388 7 Washington Zone 12 MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2008-04-11   
301-389 3 Washington Zone 13 MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2006-06-23   
301-542 1 Waldorf MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2006-01-20   
301-549 7 Ashton MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2011-11-01   
301-637 1 Washington Zone 10 MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2005-12-15   
301-820 3 Gaithersburg MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2011-05-27   
301-823 3 Washington Zone 13 MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2012-11-21   
301-828 1 Washington Zone 2 MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2005-11-11   
301-832 3 Washington Zone 4 MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2006-06-24   
301-920 5 Washington Zone 3 MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2008-12-01   
301-965 7 Washington Zone 6 MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2010-07-28   
301-974 3 Laurel MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2006-05-04   
410-888 6 Waterloo (Washington DC LATA) MD 2697 CTC COMMUNICATIONS CORP. - MD 236   2013-11-21   
571-351 4 Washington Zone 8 VA 2700 CTC COMMUNICATIONS CORP. - VA 236   2015-06-08   
571-435 8 Washington Zone 19 VA 2700 CTC COMMUNICATIONS CORP. - VA 236   2005-08-07   
571-451 A Washington Zone 8 VA 2700 CTC COMMUNICATIONS CORP. - VA 236      
571-451 1 Washington Zone 8 VA 2700 CTC COMMUNICATIONS CORP. - VA 236   2005-08-04   
571-458 7 Washington Zone 8 VA 2700 CTC COMMUNICATIONS CORP. - VA 236   2014-05-24   
703-357 A Occoquan VA 2700 CTC COMMUNICATIONS CORP. - VA 236      
703-357 1 Occoquan VA 2700 CTC COMMUNICATIONS CORP. - VA 236   2005-08-04   
703-454 3 Engleside VA 2700 CTC COMMUNICATIONS CORP. - VA 236   2007-02-06   
703-776 1 Washington Zone 17 VA 2700 CTC COMMUNICATIONS CORP. - VA 236   2006-01-20   
703-828 6 Braddock VA 2700 CTC COMMUNICATIONS CORP. - VA 236   2013-01-16   
703-853 A Manassas VA 2700 CTC COMMUNICATIONS CORP. - VA 236      
703-853 1 Manassas VA 2700 CTC COMMUNICATIONS CORP. - VA 236   2005-08-04   
703-877 6 Washington Zone 19 VA 2700 CTC COMMUNICATIONS CORP. - VA 236      
703-955 5 Herndon VA 2700 CTC COMMUNICATIONS CORP. - VA 236   2006-02-25   

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.