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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: DMSCMDAGDS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-233 5 Tompkinsville MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
240-254 8 Hughesville MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
240-258 0 Ridge MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-232 0 Ashton MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-235 0 Washington Zone 16 MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-242 0 Brandywine MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-244 2 Washington Zone 3 MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-246 1 Nanjemoy MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-278 3 Washington Zone 5 MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-281 0 Washington Zone 6 MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-288 0 Washington Zone 12 MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-290 4 Mechanicsville MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-298 0 Washington Zone 15 MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-375 1 Indian Head MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-539 1 La Plata MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-575 8 Laurel MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-691 0 Poolesville MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-761 0 Washington Zone 11 MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-833 0 Washington Zone 14 MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-886 0 Washington Zone 13 MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-978 0 Washington Zone 10 MD 2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.