Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Washington Zone 15 (Baltimore LATA), MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-812 A NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-812 0 NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-812 1 NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-812 2 NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      
301-812 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2015-09-05   
301-812 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-08   
301-812 5 BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238   2013-08-28   
301-812 6 BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2013-11-26   
301-812 7 BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2010-10-04   
301-812 8 BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-06-22   
301-812 9 HRNDVACKAMD  1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 238   2004-01-31   
301-855 A NRBHMDNEDS0  9212 VERIZON MARYLAND, INC. 238      

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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