Local Calling Guide

Area code/prefix search

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
410-794 2 Columbia MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-794 3 Columbia MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-794 4 Columbia MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-794 7 Columbia MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-794 8 Columbia MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-794 9 Columbia MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-807 A Catonsville MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-807 7 Catonsville MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-921 A Severn MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-921 4 Severn MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-927 A Odenton MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-927 0 Odenton MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-927 2 Odenton MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-927 4 Odenton MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-927 7 Odenton MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-927 9 Odenton MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-290 A Parkville MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-290 2 Parkville MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-353 4 Cockeysville MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238   2012-04-26   
443-403 8 Aberdeen MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 236   2013-08-18   
443-440 3 Annapolis MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238   2010-11-07   
443-440 8 Annapolis MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238   2011-02-11   
443-440 9 Annapolis MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238   2011-02-11   
443-708 A Baltimore MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-708 9 Baltimore MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-798 A Towson MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-798 9 Towson MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-870 A Pikesville MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-870 2 Pikesville MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-870 6 Pikesville MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-870 7 Pikesville MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-870 8 Pikesville MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-870 9 Pikesville MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-905 3 Annapolis MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238   2013-09-21   
443-905 4 Annapolis MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238   2013-10-04   
443-905 5 Annapolis MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238   2013-10-04   
443-951 7 Annapolis MD 7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238   2014-11-12   

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

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