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
443-779 A Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
443-779 2 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 3 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 4 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 5 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 6 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 7 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-779 8 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-782 A Annapolis MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-782 0 Annapolis MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-789 5 Westminster MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2008-10-25   
443-793 A Parkville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-793 0 Parkville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-793 1 Parkville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-793 4 Parkville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-795 A Severn MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-795 0 Severn MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-795 3 Severn MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-795 5 Severn MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-796 A Pikesville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-796 0 Pikesville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-796 4 Pikesville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-796 7 Pikesville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-797 A Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-797 0 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-797 1 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-797 6 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-14   
443-797 8 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-798 6 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-14   
443-815 A Essex MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-815 0 Essex MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-815 5 Essex MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-815 6 Essex MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-816 A Severna Park MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-816 0 Severna Park MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-816 1 Severna Park MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-816 2 Severna Park MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-817 A Armiger-Gibson Island MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-817 0 Armiger-Gibson Island MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-817 1 Armiger-Gibson Island MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-817 4 Armiger-Gibson Island MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-817 5 Armiger-Gibson Island MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-817 6 Armiger-Gibson Island MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-817 9 Armiger-Gibson Island MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-836 A Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-836 0 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-853 2 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-15   
443-853 3 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-15   
443-853 4 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-20   
443-853 5 Baltimore MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-20   

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

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