Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Washington Zone 14 (Baltimore LATA), MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-912 8 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
301-912 9 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
301-970 A PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
301-970 0   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-24   
301-970 1   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-24   
301-970 2 PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
301-970 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2019-02-19   
301-970 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2019-02-19   
301-970 5 PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
301-970 6 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-11-08   
301-970 8   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-24   
301-970 9 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-11-13   
301-973 A BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
301-973 0   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-24   
301-973 1   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-24   
301-973 2   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-24   
301-973 3 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2018-11-20   
301-973 4 BLTMMDCHXVX  321J HD CARRIER LLC 238   2020-05-02   
301-973 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-10-17   
301-973 6 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2020-04-19   
301-973 7   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
301-973 8   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-24   
301-973 9   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-24   

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

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