Local Calling Guide

Area code/prefix search

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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
301-205 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-10-17   
301-205 6 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
301-205 7 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
301-205 8 BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238   2016-05-14   
301-205 9 BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238   2016-05-14   
301-261 A COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-612 A BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
301-612 0 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-612 1 BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238   2016-09-05   
301-612 2 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
301-612 3 BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238   2016-09-05   
301-612 4 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-612 5 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-612 6 BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2012-12-09   
301-612 7 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-612 8 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-612 9 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-621 A ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-629 A CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
301-629 0 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
301-629 1   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-24   
301-629 2 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
301-629 3   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-24   
301-629 4   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-24   
301-629 5   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-24   
301-629 6   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
301-629 7   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
301-629 8   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-24   
301-629 9   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
301-858 A COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-889 A GLVLMDGLRS1  9212 VERIZON MARYLAND, INC. 238      
301-889 0 GLVLMDGLRS1  9212 VERIZON MARYLAND, INC. 238      
301-889 1 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-889 2 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-11-08   
301-889 3 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-889 4 BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-09-05   
301-889 5 BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238   2016-09-05   
301-889 6 BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238   2016-09-05   
301-889 7 BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238   2016-09-05   
301-889 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-07   
301-889 9 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-07   
301-912 A ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 0 ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 1 ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 2 ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 3 ODTNMDPORS2  9212 VERIZON MARYLAND, INC. 238      
301-912 4 ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 5 ODTNMDPORS2  9212 VERIZON MARYLAND, INC. 238      
301-912 6 ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 7 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      

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

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