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.

OCN: 2593 CORE COMMUNICATIONS, INC.- MD

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
667-366 8 Hampstead MD   238   2018-12-06   
667-372 A Cambridge MD ESTNMDBNGT0  242      
667-372 0 Cambridge MD   242   2018-12-06   
667-372 1 Cambridge MD   242   2018-12-06   
667-372 2 Cambridge MD   242   2018-12-06   
667-372 3 Cambridge MD   242   2018-12-06   
667-372 6 Cambridge MD   242   2018-12-06   
667-372 7 Cambridge MD ESTNMDBNGT0  242   2019-03-28   
667-373 A North Beach MD BLTMMD91GT0  238      
667-373 0 North Beach MD   238   2018-12-06   
667-373 1 North Beach MD   238   2018-12-06   
667-373 2 North Beach MD BLTMMD91GT0  238   2019-03-29   
667-373 3 North Beach MD   238   2018-12-06   
667-373 4 North Beach MD BLTMMD91GT0  238   2019-06-26   
667-373 5 North Beach MD BLTMMD91GT0  238   2019-06-26   
667-373 6 North Beach MD BLTMMD91GT0  238   2019-03-29   
667-373 7 North Beach MD BLTMMD91GT0  238   2019-03-29   
667-373 8 North Beach MD BLTMMD91GT0  238   2019-06-26   
667-373 9 North Beach MD BLTMMD91GT0  238   2019-06-26   
667-382 A Wingate MD ESTNMDBNGT0  242      
667-382 0 Wingate MD   242   2018-12-07   
667-382 1 Wingate MD   242   2018-12-07   
667-382 2 Wingate MD SLBRMD90DS0  242   2019-06-07   
667-382 3 Wingate MD SLBRMD90DS0  242   2019-06-07   
667-382 4 Wingate MD   242   2018-12-07   
667-382 5 Wingate MD SLBRMD90DS0  242   2019-06-07   
667-382 6 Wingate MD SLBRMD90DS0  242   2019-06-07   
667-444 6 Baltimore MD BLTMMD91GT0  238   2019-04-12   
667-458 1 Annapolis MD   238   2018-10-30   
667-458 8 Annapolis MD   238   2018-10-30   
667-473 A Solomons MD BLTMMD91GT0  238      
667-473 0 Solomons MD   238   2018-12-07   
667-473 1 Solomons MD   238   2018-12-07   
667-473 4 Solomons MD BLTMMD91GT0  238   2019-06-26   
667-473 5 Solomons MD   238   2018-12-07   
667-473 6 Solomons MD BLTMMD91GT0  238   2019-03-29   
667-473 7 Solomons MD BLTMMD91GT0  238   2019-03-29   
667-473 8 Solomons MD BLTMMD91GT0  238   2019-06-26   
667-473 9 Solomons MD BLTMMD91GT0  238   2019-06-26   
667-500 A Annapolis MD BLTMMD91GT0  238      
667-500 0 Annapolis MD   238   2018-07-23   
667-500 1 Annapolis MD   238   2018-07-23   
667-500 5 Annapolis MD   238   2018-07-23   
667-500 6 Annapolis MD   238   2018-10-30   
667-500 7 Annapolis MD   238   2018-10-30   
667-500 8 Annapolis MD   238   2018-10-30   
667-500 9 Annapolis MD   238   2018-10-30   
667-545 A Warwick MD ESTNMDBNGT0  242      
667-545 0 Warwick MD   242   2018-12-07   
667-545 1 Warwick MD   242   2018-12-07   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 >>

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.