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.

OCN: 361H ATLANTECH ONLINE, INC. - MD

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
240-537 A Hagerstown MD CMLDMDCMTMD  240      
240-537 0 Hagerstown MD CMLDMDCMTMD  240   2017-11-17   
240-641 6 Washington Zone 3 MD VINNVACB1MD  236   2015-12-26   
240-660 9 Washington Zone 10 MD VINNVACB1MD  236   2015-12-26   
240-740 A Washington Zone 10 MD VINNVACB1MD  236      
240-740 0 Washington Zone 10 MD VINNVACB1MD  236   2015-11-01   
240-740 1 Washington Zone 10 MD VINNVACB1MD  236   2015-11-01   
240-740 2 Washington Zone 10 MD VINNVACB1MD  236   2015-11-01   
240-740 3 Washington Zone 10 MD VINNVACB1MD  236   2015-11-01   
240-740 4 Washington Zone 10 MD VINNVACB1MD  236   2015-11-01   
240-740 5 Washington Zone 10 MD VINNVACB1MD  236   2015-11-01   
240-740 6 Washington Zone 10 MD VINNVACB1MD  236   2015-11-01   
240-740 7 Washington Zone 10 MD VINNVACB1MD  236   2015-11-01   
240-740 8 Washington Zone 10 MD VINNVACB1MD  236   2015-11-01   
240-740 9 Washington Zone 10 MD VINNVACB1MD  236   2015-11-01   
667-227 A Salisbury MD SLBRMDSBPMD  242      
667-227 0 Salisbury MD SLBRMDSBPMD  242   2017-11-17   
667-312 A Baltimore MD BLTMMDSN1MD  238      
667-312 1 Baltimore MD BLTMMDSN1MD  238   2015-07-20   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.