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: 822

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-822 A Washington Zone 11 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-822 0 Washington Zone 11 MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2016-09-01   
301-822 1 Washington Zone 11 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-24   
301-822 2 Washington Zone 11 MD   876D ONVOY, LLC - MD 236   2016-02-09   
301-822 3 Washington Zone 11 MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2016-09-01   
301-822 4 Washington Zone 11 MD   318J COMCAST IP PHONE, LLC 236   2013-10-03   
301-822 5 Washington Zone 11 MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2016-09-01   
301-822 6 Washington Zone 11 MD   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-24   
301-822 7 Washington Zone 11 MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2016-09-01   
301-822 8 Washington Zone 11 MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2016-09-01   
301-822 9 Washington Zone 11 MD   568G PEERLESS NETWORK OF MARYLAND, LLC 236      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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