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      
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      
443-284 A Waterloo 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      
443-363 A Severn 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      
443-586 A Dundalk MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
443-592 A Elkridge MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
443-596 A Essex 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      
667-236 A Perryville MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-237 A West River MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-267 A Annapolis MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-269 A Elkton MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-277 A Sherwood Forest MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-295 A Crofton MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-300 A Columbia MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-332 A New Windsor MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-336 A Bel Air MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-345 A Catonsville MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-362 A Annapolis MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-366 A Hampstead MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-373 A North Beach MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-473 A Solomons MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-500 A Annapolis MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-627 A Annapolis MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-653 A Brooklyn Park-Linthicum MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-686 A Ellicott City MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-722 A Glenwood MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-837 A Port Deposit MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-866 A Darlington MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-876 A Annapolis MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-946 A Churchville MD 2593 CORE COMMUNICATIONS, INC.- MD 238      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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