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.

NPA: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-339 A Washington Zone 15 MD WASJDCDBDS1  4820 CAVALIER EAST LLC - MD 236      
240-339 0 Washington Zone 15 MD   4820 CAVALIER EAST LLC - MD 236      
240-339 1 Washington Zone 15 MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 236   2006-03-14   
240-339 2 Washington Zone 15 MD   087F CBEYOND COMMUNICATIONS, LLC - MD 236   2008-10-05   
240-339 3 Washington Zone 15 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2008-12-13   
240-339 4 Washington Zone 15 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-06-26   
240-339 5 Washington Zone 15 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-20   
240-339 6 Washington Zone 15 MD   876D ONVOY, LLC - MD 236   2012-10-07   
240-339 7 Washington Zone 15 MD   7575 CENTURYLINK COMMUNICATIONS LLC 236   2014-06-12   
240-339 8 Washington Zone 15 MD   876D ONVOY, LLC - MD 236   2015-07-23   
240-339 9 Washington Zone 15 MD   4820 CAVALIER EAST LLC - MD 236      

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.