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
443-728 9 Berlin MD   242   2018-10-19   
443-729 7 Woodlawn MD   238   2019-05-02   
443-731 0 Port Deposit MD   238   2018-07-07   
443-731 8 Port Deposit MD   238   2018-07-07   
443-732 4 Silver Run MD   238   2019-03-29   
443-733 7 Waterloo MD   238   2019-05-02   
443-737 3 Waterloo MD   238   2019-05-02   
443-737 5 Waterloo MD   238   2019-05-02   
443-746 5 Easton MD   242   2019-04-12   
443-746 6 Easton MD   242   2019-04-12   
443-747 A Port Deposit MD BLTMMD91GT0  238      
443-747 0 Port Deposit MD   238   2004-04-02   
443-747 3 Port Deposit MD   238      
443-748 6 Millersville MD   238   2018-06-16   
443-748 7 Millersville MD   238   2018-06-16   
443-751 2 Woodlawn MD   238   2019-05-02   
443-763 8 Glen Burnie MD   238   2019-05-01   
443-767 2 Worthington MD   238   2004-04-02   
443-767 6 Worthington MD   238   2019-03-29   
443-773 7 Brooklyn Park-Linthicum MD   238   2019-06-26   
443-773 8 Brooklyn Park-Linthicum MD   238   2018-06-16   
443-774 2 Columbia MD   238   2019-03-28   
443-774 3 Columbia MD   238   2019-03-28   
443-774 6 Columbia MD   238   2019-03-28   
443-774 7 Columbia MD   238   2019-03-28   
443-777 9 Essex MD   238   2019-04-30   
443-780 8 Woodlawn MD   238   2018-10-23   
443-781 0 Armiger-Gibson Island MD   238   2019-04-30   
443-782 1 Annapolis MD   238   2018-10-30   
443-782 2 Annapolis MD   238   2018-10-30   
443-782 6 Annapolis MD   238   2019-03-28   
443-782 9 Annapolis MD   238   2018-10-30   
443-793 2 Parkville MD   238   2019-05-01   
443-793 3 Parkville MD   238   2019-05-01   
443-793 9 Parkville MD   238   2019-05-01   
443-796 1 Pikesville MD   238   2018-10-23   
443-796 2 Pikesville MD   238   2018-10-23   
443-796 9 Pikesville MD   238   2018-10-23   
443-815 2 Essex MD   238   2019-04-30   
443-816 4 Severna Park MD   238   2019-04-22   
443-816 5 Severna Park MD   238   2019-04-22   
443-816 6 Severna Park MD   238   2019-04-22   
443-816 7 Severna Park MD   238   2019-04-22   
443-816 9 Severna Park MD   238   2018-10-29   
443-836 1 Baltimore MD   238   2018-10-19   
443-836 2 Baltimore MD   238   2019-04-12   
443-836 3 Baltimore MD   238   2019-04-12   
443-836 8 Baltimore MD   238   2018-10-19   
443-836 9 Baltimore MD   238   2018-10-19   
443-843 4 Havre de Grace MD   238   2018-06-16   

<< 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: Fri, 01 Jul 2022 02:53:40 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.