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: 391

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-391 A Washington Zone 13 MD WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-391 0 Washington Zone 13 MD   876D ONVOY, LLC - MD 236      
240-391 1 Washington Zone 13 MD   876D ONVOY, LLC - MD 236      
240-391 2 Washington Zone 13 MD WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-391 3 Washington Zone 13 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-391 4 Washington Zone 13 MD   876D ONVOY, LLC - MD 236      
240-391 5 Washington Zone 13 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-391 6 Washington Zone 13 MD ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
240-391 7 Washington Zone 13 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-391 8 Washington Zone 13 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-391 9 Washington Zone 13 MD   876D ONVOY, LLC - MD 236      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.