Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-323 8 Laurel MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-02-22   
301-337 7 Gaithersburg MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-02-19   
301-337 8 Gaithersburg MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-02-19   
301-349 6 Poolesville MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-08-19   
301-364 4 Washington Zone 4 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-10-14   
301-375 0 Indian Head MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2008-12-13   
301-375 2 Indian Head MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2007-10-22   
301-388 5 Washington Zone 12 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2014-06-06   
301-388 8 Washington Zone 12 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-20   
301-392 7 La Plata MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-06-02   
301-448 3 Washington Zone 3 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-11-07   
301-450 0 Washington Zone 3 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-17   
301-450 1 Washington Zone 3 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-17   
301-450 2 Washington Zone 3 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-17   
301-450 3 Washington Zone 3 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-17   
301-450 4 Washington Zone 3 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-17   
301-456 0 Washington Zone 5 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-06-26   
301-458 0 Washington Zone 4 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2008-12-13   
301-458 6 Washington Zone 4 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-08-19   
301-458 8 Washington Zone 4 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-08-19   
301-485 6 Washington Zone 6 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-02-22   
301-485 9 Washington Zone 6 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2008-12-13   
301-500 0 Washington Zone 2 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-07-31   
301-531 4 Washington Zone 4 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-02-22   
301-531 5 Washington Zone 4 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-02-22   
301-539 2 La Plata MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-08-19   
301-539 9 La Plata MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2008-12-13   
301-541 3 Washington Zone 5 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-02-19   
301-541 7 Washington Zone 5 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2008-12-13   
301-541 8 Washington Zone 5 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2008-12-13   
301-558 0 Washington Zone 13 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2026-05-09   
301-558 1 Washington Zone 13 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2026-05-09   
301-569 2 Gaithersburg MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-07   
301-578 2 Washington Zone 3 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2020-06-13   
301-578 5 Washington Zone 3 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2020-06-13   
301-578 6 Washington Zone 3 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2018-07-19   
301-615 A Washington Zone 13 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-635 A Washington Zone 5 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-636 5 Washington Zone 5 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-09-27   
301-636 7 Washington Zone 5 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-09-27   
301-647 A Washington Zone 13 MD 9748 AMERICAN MESSAGING SERVICES, LLC 236      
301-664 4 Washington Zone 2 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2018-10-19   
301-679 0 Washington Zone 12 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-20   
301-679 3 Washington Zone 12 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2012-04-29   
301-679 5 Washington Zone 12 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2012-08-12   
301-683 8 Washington Zone 4 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-02-18   
301-683 9 Washington Zone 4 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2012-09-06   
301-684 4 Indian Head MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-08-19   
301-684 8 Indian Head MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-08-14   
301-686 7 Washington Zone 6 MD 071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-06-26   

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Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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