Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-393 3 Columbia MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-09-10   
443-393 4 Columbia MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-393 5 Columbia MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-393 6 Columbia MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-08   
443-393 7 Columbia MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2011-04-03   
443-393 8 Columbia MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-393 9 Columbia MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-396 A Odenton MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-396 1 Odenton MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-403 A Aberdeen MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
443-403 0 Aberdeen MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
443-403 1 Aberdeen MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
443-403 2 Aberdeen MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
443-406 2 Elkton MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-03   
443-406 4 Elkton MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2011-11-05   
443-417 1 Fallston MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-08-13   
443-423 A Baltimore MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-423 1 Baltimore MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-426 2 Randallstown MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-02-12   
443-426 4 Randallstown MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-08-20   
443-426 8 Randallstown MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-05   
443-438 1 Baltimore MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2010-01-11   
443-441 2 Glenwood MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2016-10-16   
443-445 2 Elkridge MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-06-26   
443-450 A Pikesville MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-450 1 Pikesville MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2012-07-29   
443-450 4 Pikesville MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-453 5 Baltimore MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-05-16   
443-455 1 Baltimore MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2009-10-12   
443-456 7 Edgewood MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-459 4 Elkridge MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-08-13   
443-470 8 Towson MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2009-08-13   
443-471 8 Pikesville MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2007-09-25   
443-472 A Columbia MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-472 4 Columbia MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-483 A Cardiff MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-483 4 Cardiff MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2004-02-07   
443-484 A Edgewood MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-484 4 Edgewood MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-485 A Elkton MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-485 5 Elkton MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-05-16   
443-486 A Prince Frederick MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-486 7 Prince Frederick MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-13   
443-487 A Westminster MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-487 4 Westminster MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-05   
443-492 A Elkridge MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-492 2 Elkridge MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-12   
443-492 3 Elkridge MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-12   
443-492 5 Elkridge MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-501 A Pikesville MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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