Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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Switch: BLTMMDCHXNX

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-276 5 Columbia MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 6 Columbia MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 7 Columbia MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-276 9 Columbia MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 A Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 0 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 1 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 2 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 3 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 4 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 5 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 6 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 7 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-279 9 Towson MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 A Cockeysville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 0 Cockeysville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 1 Cockeysville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 2 Cockeysville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 5 Cockeysville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 6 Cockeysville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-281 7 Cockeysville MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-285 6 Columbia MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 A Ellicott City MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 0 Ellicott City MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 1 Ellicott City MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 2 Ellicott City MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 4 Ellicott City MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 5 Ellicott City MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 6 Ellicott City MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 7 Ellicott City MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 8 Ellicott City MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-288 9 Ellicott City MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-293 8 Westminster MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2007-05-14   
443-296 6 Waterloo MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2009-07-11   
443-296 8 Waterloo MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-14   
443-296 9 Waterloo MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-14   
443-303 8 Aberdeen MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2007-02-19   
443-304 6 Arbutus MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2006-10-20   
443-308 A Severn MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-308 0 Severn MD 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
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      
443-327 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   
443-333 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      

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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