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: 790

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-790 A Washington Zone 13 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-790 0 Washington Zone 13 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-790 1 Washington Zone 13 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-790 2 Washington Zone 13 MD BTVLMD127MD  5562 METROPCS, INC. 236   2016-07-24   
240-790 3 Washington Zone 13 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-790 4 Washington Zone 13 MD BTVLMD127MD  5562 METROPCS, INC. 236   2020-04-02   
240-790 5 Washington Zone 13 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2022-12-22   
240-790 6 Washington Zone 13 MD BTVLMD127MD  5562 METROPCS, INC. 236   2016-09-26   
240-790 7 Washington Zone 13 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-790 8 Washington Zone 13 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2017-04-19   
240-790 9 Washington Zone 13 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2023-03-23   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.