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
301-812 A Washington Zone 15 (Baltimore LATA) MD NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-812 0 Washington Zone 15 (Baltimore LATA) MD   9212 VERIZON MARYLAND, INC. 238      
301-812 1 Washington Zone 15 (Baltimore LATA) MD   9212 VERIZON MARYLAND, INC. 238      
301-812 2 Washington Zone 15 (Baltimore LATA) MD   9212 VERIZON MARYLAND, INC. 238      
301-812 3 Washington Zone 15 (Baltimore LATA) MD   876D ONVOY, LLC - MD 238   2015-09-05   
301-812 4 Washington Zone 15 (Baltimore LATA) MD   876D ONVOY, LLC - MD 238   2012-10-08   
301-812 5 Washington Zone 15 (Baltimore LATA) MD   2697 CTC COMMUNICATIONS CORP. - MD 238   2013-08-28   
301-812 6 Washington Zone 15 (Baltimore LATA) MD   281E YMAX COMMUNICATIONS CORP. - MD 238   2013-11-26   
301-812 7 Washington Zone 15 (Baltimore LATA) MD   281E YMAX COMMUNICATIONS CORP. - MD 238   2010-10-04   
301-812 8 Washington Zone 15 (Baltimore LATA) MD   8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-06-22   
301-812 9 Washington Zone 15 (Baltimore LATA) MD   1958 ATX TELECOMMUNICATIONS SERVICES, LTD 238   2004-01-31   

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

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