Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 301 [Rate centres in NPA 301] [Dial plan for NPA 301]

NXX: 349

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-349 A Poolesville MD PLVLMDPVRS2  9212 VERIZON MARYLAND, INC. 236      
301-349 0 Poolesville MD   9212 VERIZON MARYLAND, INC. 236      
301-349 1 Poolesville MD   568G PEERLESS NETWORK OF MARYLAND, LLC 236   2013-05-03   
301-349 2 Poolesville MD   9212 VERIZON MARYLAND, INC. 236      
301-349 3 Poolesville MD   876D ONVOY, LLC - MD 236   2016-03-01   
301-349 4 Poolesville MD   9212 VERIZON MARYLAND, INC. 236      
301-349 5 Poolesville MD   9212 VERIZON MARYLAND, INC. 236      
301-349 6 Poolesville MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-08-19   
301-349 7 Poolesville MD   829J PAETEC ITEL, LLC 236   2007-04-15   
301-349 8 Poolesville MD   829J PAETEC ITEL, LLC 236   2011-01-28   
301-349 9 Poolesville MD   515J IP HORIZON LLC 236   2015-03-21   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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