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
443-274 3 Severn MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-275 4 Towson MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-275 6 Towson MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2012-10-27   
443-289 A Westminster MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-289 2 Westminster MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-06-30   
443-289 3 Westminster MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-06-30   
443-300 3 Sykesville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-302 6 Crofton MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-303 3 Aberdeen MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 236   2007-04-15   
443-354 5 Glen Burnie MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2009-11-05   
443-390 3 Churchville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-02-01   
443-409 3 Edgewood MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-425 3 Parkville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-430 7 Columbia MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-05-30   
443-430 8 Columbia MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2006-03-11   
443-441 5 Glenwood MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2018-01-22   
443-470 7 Towson MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-12-01   
443-475 A Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-475 3 Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-07-16   
443-475 4 Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-07-16   
443-489 5 Chase MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-491 7 Parkton MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2020-09-04   
443-494 3 Millersville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-508 3 Hampstead MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2009-01-05   
443-514 3 Catonsville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2021-05-13   
443-532 3 Prince Frederick MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2007-04-15   
443-535 4 Columbia MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2006-05-15   
443-539 5 Columbia MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-546 2 Columbia MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2007-08-24   
443-567 7 Bel Air MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2012-04-17   
443-576 3 Randallstown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-590 5 Reisterstown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-594 3 Sparrows Point MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-598 3 Sherwood Forest MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-620 2 Waterloo MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2020-06-05   
443-625 3 Fork MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-660 1 Pikesville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2005-06-05   
443-660 2 Pikesville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2005-06-05   
443-660 3 Pikesville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2005-06-05   
443-660 5 Pikesville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2005-06-05   
443-686 7 Fallston MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2009-03-02   
443-696 4 Dundalk MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-707 4 Aberdeen MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 236   2014-11-17   
443-713 4 Glen Burnie MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2013-01-04   
443-731 4 Port Deposit MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2017-08-03   
443-733 3 Waterloo MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-741 A Columbia MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-741 3 Columbia MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-05-13   
443-741 4 Columbia MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2012-05-05   
443-750 6 Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2010-08-25   
443-776 5 Elkridge MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2015-01-28   
443-782 7 Annapolis MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2018-06-15   
443-784 3 Armiger-Gibson Island MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-792 4 Brooklyn Park-Linthicum MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-820 2 Elkridge MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2009-07-28   
443-820 4 Elkridge MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-832 2 Columbia MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2009-11-13   
443-833 3 Arbutus MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-860 3 Catonsville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-860 4 Catonsville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2010-12-29   
443-860 5 Catonsville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-01-18   
443-860 7 Catonsville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-11-04   
443-868 3 Essex MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-873 4 Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2013-09-10   
443-914 4 Worthington MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2017-06-05   
443-918 4 Taneytown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2010-02-01   
443-931 A Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-931 3 Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-12-08   
443-947 6 Perryville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2019-10-01   
443-949 3 Annapolis MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-952 5 Westminster MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2013-08-23   
443-964 3 North Beach MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2010-02-01   
443-973 3 Ellicott City MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
667-205 2 Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2015-01-15   
667-205 3 Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2013-12-05   
667-214 1 Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2014-03-07   
667-214 2 Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2014-07-30   
667-218 7 Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2015-08-12   
667-228 5 Aberdeen MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 236   2015-08-17   
667-257 6 Columbia MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2021-05-01   
667-259 A Reisterstown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
667-259 3 Reisterstown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2019-02-04   
667-259 4 Reisterstown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2019-02-04   
667-259 5 Reisterstown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2019-02-04   
667-276 A Bel Air MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
667-276 3 Bel Air MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2020-03-19   
667-296 A Reisterstown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
667-296 2 Reisterstown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2020-11-13   
667-296 3 Reisterstown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2020-11-13   
667-296 4 Reisterstown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2020-11-13   
667-296 6 Reisterstown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2021-02-05   
667-296 7 Reisterstown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2021-02-05   
667-296 8 Reisterstown MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2021-02-05   
667-312 3 Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2015-11-16   
667-312 4 Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2017-02-09   
667-312 5 Baltimore MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2018-11-15   
667-313 A Pikesville MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
667-786 7 Columbia MD 7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2016-03-14   

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Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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