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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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-345 A Ashton (Baltimore LATA) MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
240-865 A Washington Zone 14 (Baltimore LATA) MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
410-779 A Baltimore MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-219 A Parkville MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-221 A Annapolis MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-244 A Westminster MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-292 A Crofton MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-295 A Prince Frederick MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-341 A Catonsville MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-345 A Aberdeen MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
443-354 A Glen Burnie MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-355 A Ellicott City MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-356 A Bel Air MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-380 A Woodlawn MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-450 A Pikesville MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-472 A Columbia MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-551 A Woodlawn MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-564 A Towson MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-567 A Bel Air MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-569 A Annapolis MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-832 A Columbia MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-877 A North East MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-964 A North Beach MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-07-03   
443-992 A Baltimore MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      

Last updated: Sat, 29 Jun 2019 02:32:58 UTC

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