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
443-308 1 Severn MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-308 2 Severn MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-308 4 Severn MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-308 5 Severn MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-308 9 Severn MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-319 8 Columbia MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-11-19   
443-327 2 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2005-10-13   
443-327 3 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2005-10-13   
443-327 4 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2005-10-13   
443-327 5 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2005-10-13   
443-330 6 Cockeysville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2011-04-13   
443-333 5 Annapolis MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-07-18   
443-334 A Pikesville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-334 1 Pikesville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-345 3 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-03-13   
443-378 5 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-09-23   
443-378 7 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-09-23   
443-378 8 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-09-23   
443-400 A Brooklyn Park-Linthicum MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-400 0 Brooklyn Park-Linthicum MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-400 2 Brooklyn Park-Linthicum MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-400 5 Brooklyn Park-Linthicum MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-403 4 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-403 5 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-403 6 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-403 7 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-407 A Dundalk MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 0 Dundalk MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 1 Dundalk MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 2 Dundalk MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 4 Dundalk MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 5 Dundalk MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 6 Dundalk MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-407 9 Dundalk MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-408 A Sparrows Point MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-408 0 Sparrows Point MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-408 1 Sparrows Point MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-408 5 Sparrows Point MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-10-13   
443-408 6 Sparrows Point MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-10-13   
443-408 9 Sparrows Point MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-430 A Columbia MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-430 0 Columbia MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-430 2 Columbia MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-14   
443-430 3 Columbia MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-430 6 Columbia MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-14   
443-430 9 Columbia MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-433 A Annapolis MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-433 0 Annapolis MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-433 4 Annapolis MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-433 5 Annapolis 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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