Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: BLTMMDCHXNX

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-650 0 Reisterstown MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-650 1 Reisterstown MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-681 1 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-12-06   
443-681 2 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-12-06   
443-681 3 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-12-06   
443-681 4 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-12-06   
443-681 5 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-12-06   
443-692 A Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 0 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 1 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 2 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 3 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 4 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 5 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 6 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 9 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-701 A Arbutus MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-701 0 Arbutus MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-701 1 Arbutus MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-701 2 Arbutus MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-701 6 Arbutus MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2023-02-20   
443-703 A Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-703 0 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-703 1 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-703 2 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-703 3 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-03-10   
443-703 4 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-04-16   
443-703 5 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-04-16   
443-703 7 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-04-16   
443-710 A Catonsville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-710 0 Catonsville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-710 4 Catonsville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-710 8 Catonsville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-712 5 Reisterstown MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2007-07-30   
443-716 3 Annapolis MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2007-03-18   
443-720 A Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
443-720 1 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2013-01-11   
443-720 2 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2013-01-11   
443-720 4 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2013-06-15   
443-720 5 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2013-01-14   
443-733 0 Waterloo MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2003-02-16   
443-740 9 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-03   
443-773 A Brooklyn Park-Linthicum MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 0 Brooklyn Park-Linthicum MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 1 Brooklyn Park-Linthicum MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 3 Brooklyn Park-Linthicum MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 4 Brooklyn Park-Linthicum MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 5 Brooklyn Park-Linthicum MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 6 Brooklyn Park-Linthicum MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-773 9 Brooklyn Park-Linthicum MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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