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: 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 PLVLMDPVRS2  9212 VERIZON MARYLAND, INC. 236      
301-349 1 Poolesville MD SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2013-05-03   
301-349 2 Poolesville MD PLVLMDPVRS2  9212 VERIZON MARYLAND, INC. 236      
301-349 3 Poolesville MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-03-01   
301-349 4 Poolesville MD PLVLMDPVRS2  9212 VERIZON MARYLAND, INC. 236      
301-349 5 Poolesville MD PLVLMDPVRS2  9212 VERIZON MARYLAND, INC. 236      
301-349 6 Poolesville MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-08-19   
301-349 7 Poolesville MD CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236   2007-04-15   
301-349 8 Poolesville MD WASHDC12OMD  4820 CAVALIER EAST LLC - MD 236   2011-01-28   
301-349 9 Poolesville MD SLSPMD912MD  082H LOCAL ACCESS LLC - MD 236   2015-03-21   

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.