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:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-850 A Washington Zone 14 MD RSTNVA91RS0  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-850 0 Washington Zone 14 MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-04-27   
301-850 1 Washington Zone 14 MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2005-01-19   
301-850 2 Washington Zone 14 MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2005-01-19   
301-850 3 Washington Zone 14 MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2007-04-19   
301-850 4 Washington Zone 14 MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2002-06-04   
301-850 5 Washington Zone 14 MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2014-10-04   
301-850 6 Washington Zone 14 MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2012-04-21   
301-850 7 Washington Zone 14 MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-08-10   
301-850 8 Washington Zone 14 MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2017-02-04   
301-850 9 Washington Zone 14 MD   1958 ATX TELECOMMUNICATIONS SERVICES, LTD 236   2004-03-27   

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

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