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: BLTMMD91GT0

1 2 >>

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      
410-214 0 Rising Sun MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2009-05-09   
410-214 8 Rising Sun MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-06-27   
410-214 9 Rising Sun MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-06-27   
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      
443-337 8 Sparrows Point MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-337 9 Sparrows Point MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-31   
443-344 A Severna Park MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
443-346 6 Severna Park MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
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      
443-628 0 Glen Burnie MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-628 2 Glen Burnie MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-747 A Port Deposit MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
443-747 0 Port Deposit MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-747 3 Port Deposit MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
443-912 A Towson MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
443-912 1 Towson MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2002-08-23   
443-946 2 Parkville MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
667-236 A Perryville MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-236 3 Perryville MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-236 4 Perryville MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-236 5 Perryville MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   
667-236 6 Perryville MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-236 7 Perryville MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-237 A West River MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-237 3 West River MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-237 4 West River MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-237 6 West River MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-237 8 West River MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-267 A Annapolis MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-269 A Elkton MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-269 8 Elkton MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-28   
667-277 A Sherwood Forest MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-277 2 Sherwood Forest MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-277 5 Sherwood Forest MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-277 6 Sherwood Forest MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-277 7 Sherwood Forest MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-277 8 Sherwood Forest MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-277 9 Sherwood Forest MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-295 A Crofton MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-295 4 Crofton MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-295 6 Crofton MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-300 A Columbia MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-332 A New Windsor MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-332 2 New Windsor MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-332 3 New Windsor MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   
667-332 4 New Windsor MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-332 5 New Windsor MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-332 6 New Windsor MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-332 7 New Windsor MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-332 9 New Windsor MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   
667-336 A Bel Air MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-336 2 Bel Air MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-336 3 Bel Air MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-336 4 Bel Air MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-336 6 Bel Air MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-336 7 Bel Air MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
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      
667-366 2 Hampstead MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-366 3 Hampstead MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-366 4 Hampstead MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-366 5 Hampstead MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-373 A North Beach MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-373 2 North Beach MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-373 4 North Beach MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-06-26   
667-373 5 North Beach MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-06-26   
667-373 6 North Beach MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-373 7 North Beach MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-373 8 North Beach MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-06-26   
667-373 9 North Beach MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-06-26   
667-473 A Solomons MD 2593 CORE COMMUNICATIONS, INC.- MD 238      
667-473 4 Solomons MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-06-26   
667-473 6 Solomons MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-473 7 Solomons MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-473 8 Solomons MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-06-26   
667-473 9 Solomons MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-06-26   
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      
667-722 2 Glenwood MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-722 3 Glenwood MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-722 4 Glenwood MD 2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   

1 2 >>

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.