Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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   240   2017-11-17   
240-641 6 Washington Zone 3 MD   236   2015-12-26   
240-660 9 Washington Zone 10 MD   236   2015-12-26   
240-740 A Washington Zone 10 MD VINNVACB1MD  236      
240-740 0 Washington Zone 10 MD   236   2015-11-01   
240-740 1 Washington Zone 10 MD   236   2015-11-01   
240-740 2 Washington Zone 10 MD   236   2015-11-01   
240-740 3 Washington Zone 10 MD   236   2015-11-01   
240-740 4 Washington Zone 10 MD   236   2015-11-01   
240-740 5 Washington Zone 10 MD   236   2015-11-01   
240-740 6 Washington Zone 10 MD   236   2015-11-01   
240-740 7 Washington Zone 10 MD   236   2015-11-01   
240-740 8 Washington Zone 10 MD   236   2015-11-01   
240-740 9 Washington Zone 10 MD   236   2015-11-01   
667-227 A Salisbury MD SLBRMDSBPMD  242      
667-227 0 Salisbury MD   242   2017-11-17   
667-312 A Baltimore MD BLTMMDSN1MD  238      
667-312 1 Baltimore MD   238   2015-07-20   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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