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: 477

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-477 A Washington Zone 13 MD ARTNVAARXDY  318J COMCAST IP PHONE LLC 236   2021-01-26   
301-477 0 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-477 1 Washington Zone 13 MD   318J COMCAST IP PHONE LLC 236      
301-477 2 Washington Zone 13 MD   318J COMCAST IP PHONE LLC 236      
301-477 3 Washington Zone 13 MD   318J COMCAST IP PHONE LLC 236      
301-477 4 Washington Zone 13 MD   318J COMCAST IP PHONE LLC 236   2017-02-01   
301-477 5 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-477 6 Washington Zone 13 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-477 7 Washington Zone 13 MD   318J COMCAST IP PHONE LLC 236   2015-09-04   
301-477 8 Washington Zone 13 MD   876D ONVOY, LLC - MD 236   2018-01-14   
301-477 9 Washington Zone 13 MD   876D ONVOY, LLC - MD 236   2018-01-14   

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

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