Local Calling Guide

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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
301-235 A Washington Zone 16 MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-235 0 Washington Zone 16 MD   2593 CORE COMMUNICATIONS, INC. - MD 236   2004-03-26   
301-235 2 Washington Zone 16 MD   876D ONVOY, LLC - MD 236   2018-06-08   
301-235 3 Washington Zone 16 MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2015-09-02   
301-235 4 Washington Zone 16 MD   2593 CORE COMMUNICATIONS, INC. - MD 236   2018-10-23   
301-235 5 Washington Zone 16 MD   964H BARR TELL USA, INC. 236   2018-05-08   
301-235 7 Washington Zone 16 MD   2593 CORE COMMUNICATIONS, INC. - MD 236   2018-10-23   
301-235 9 Washington Zone 16 MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      

Last updated: Thu, 31 Jan 2019 11:20:40 UTC

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