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: 358

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-358 A Damascus MD WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-358 0 Damascus MD WASHDC127MD  073H TELNYX LLC 236      
240-358 1 Damascus MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-358 2 Damascus MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-358 3 Damascus MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-358 4 Damascus MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
240-358 5 Damascus MD WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-358 6 Damascus MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
240-358 7 Damascus MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-358 8 Damascus MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-358 9 Damascus MD WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236      

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.