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
240-412 A Waldorf MD WASHDCMTVMD  6664 SPRINT SPECTRUM L.P. 236      
240-412 0 Waldorf MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 236   2007-01-22   
240-412 1 Waldorf MD   6664 SPRINT SPECTRUM L.P. 236   2004-08-04   
240-412 2 Waldorf MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2007-09-13   
240-412 3 Waldorf MD   6664 SPRINT SPECTRUM L.P. 236   2007-07-06   
240-412 4 Waldorf MD   6664 SPRINT SPECTRUM L.P. 236   2007-07-06   
240-412 5 Waldorf MD   6664 SPRINT SPECTRUM L.P. 236   2007-07-06   
240-412 6 Waldorf MD   6664 SPRINT SPECTRUM L.P. 236   2008-02-20   
240-412 7 Waldorf MD   6664 SPRINT SPECTRUM L.P. 236   2006-08-07   
240-412 8 Waldorf MD   6664 SPRINT SPECTRUM L.P. 236   2004-04-23   
240-412 9 Waldorf MD   6664 SPRINT SPECTRUM L.P. 236      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.