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: BLTMMD91GT0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-512 A Washington Zone 13 (Baltimore LATA) MD 2593 CORE COMMUNICATIONS, INC. - MD 238      
410-214 A Rising Sun MD 2593 CORE COMMUNICATIONS, INC. - MD 238   2009-05-09   
443-217 A Annapolis MD 2593 CORE COMMUNICATIONS, INC. - MD 238      
443-236 A Cardiff MD 2593 CORE COMMUNICATIONS, INC. - MD 238      
443-237 A North Beach MD 2593 CORE COMMUNICATIONS, INC. - MD 238      
443-246 A Elkton MD 2593 CORE COMMUNICATIONS, INC. - MD 238      
443-268 A Baltimore MD 2593 CORE COMMUNICATIONS, INC. - MD 238      
443-344 A Severna Park MD 2593 CORE COMMUNICATIONS, INC. - MD 238      
443-349 A Silver Run MD 2593 CORE COMMUNICATIONS, INC. - MD 238      
443-361 A Sykesville MD 2593 CORE COMMUNICATIONS, INC. - MD 238      
443-368 A Westminster MD 2593 CORE COMMUNICATIONS, INC. - MD 238      
443-369 A Bel Air MD 2593 CORE COMMUNICATIONS, INC. - MD 238      
443-428 A Cockeysville MD 2593 CORE COMMUNICATIONS, INC. - MD 238      
443-747 A Port Deposit MD 2593 CORE COMMUNICATIONS, INC. - MD 238      
443-912 A Towson MD 2593 CORE COMMUNICATIONS, INC. - MD 238      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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