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.

NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

<< 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 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-665 5 Nanticoke MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-06-17   
443-665 6 Nanticoke MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-02   
443-665 7 Nanticoke MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-06-17   
443-665 8 Nanticoke MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2020-04-30   
443-665 9 Nanticoke MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2020-04-30   
443-666 A Chestertown MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242      
443-666 0 Chestertown MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2018-01-25   
443-666 1 Chestertown MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2021-04-08   
443-666 2 Chestertown MD SLBRMDSB8MD  2589 US LEC OF MARYLAND, INC. 242   2014-11-08   
443-666 3 Chestertown MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2012-08-02   
443-666 4 Chestertown MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2016-03-11   
443-666 5 Chestertown MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-02   
443-666 6 Chestertown MD SLBRMDSBXUX  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 242   2014-10-20   
443-666 7 Chestertown MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2018-08-27   
443-666 8 Chestertown MD SLBRMD902MD  073H TELNYX LLC 242   2017-09-13   
443-666 9 Chestertown MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2021-05-10   
443-667 A Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-667 0 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2023-07-20   
443-667 1 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2024-04-04   
443-667 2 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2024-06-06   
443-667 4 Delmar MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2025-01-09   
443-667 5 Delmar MD SLBRMD901MD  939H COMMIO, LLC 242   2023-09-30   
443-667 6 Delmar MD SLBRMD901MD  939H COMMIO, LLC 242   2023-09-30   
443-667 7 Delmar MD SLBRMD901MD  939H COMMIO, LLC 242   2023-09-30   
443-667 8 Delmar MD SLBRMD901MD  939H COMMIO, LLC 242   2023-09-30   
443-667 9 Delmar MD SLBRMD901MD  939H COMMIO, LLC 242   2023-09-30   
443-668 A Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 0 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 1 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 2 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 3 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 4 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 5 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 6 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 7 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 8 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 9 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-04-27   
443-669 A Delmar MD   829J PAETEC ITEL, LLC 242   2025-04-01   
443-669 1 Delmar MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2021-03-08   
443-669 2 Delmar MD   829J PAETEC ITEL, LLC 242      
443-669 3 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-01-29   
443-669 4 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-02-26   
443-669 5 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-02-26   
443-669 6 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-10-03   
443-669 7 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-06-05   
443-669 8 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-06-05   
443-669 9 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-10-03   
443-670 A Catonsville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-670 0 Catonsville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-670 1 Catonsville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-670 2 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-670 3 Catonsville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-670 4 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-670 5 Catonsville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-670 6 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-670 7 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-670 8 Catonsville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-670 9 Catonsville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-671 A New Windsor MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-671 0 New Windsor MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
443-671 1 New Windsor MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-05   
443-671 2 New Windsor MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-09-02   
443-671 4 New Windsor MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-31   
443-671 5 New Windsor MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238   2006-04-07   
443-671 6 New Windsor MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-01-19   
443-671 7 New Windsor MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-11-18   
443-671 8 New Windsor MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-31   
443-671 9 New Windsor MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-672 A Parkton MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-672 0 Parkton MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-672 1 Parkton MD CLMAMDJTBMD  2589 US LEC OF MARYLAND, INC. 238   2004-01-31   
443-672 2 Parkton MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-02-25   
443-672 3 Parkton MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-672 4 Parkton MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2019-02-19   
443-672 5 Parkton MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2019-02-19   
443-672 6 Parkton MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-672 7 Parkton MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-672 8 Parkton MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-10-12   
443-672 9 Parkton MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-673 A Brooklyn Park-Linthicum MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-673 0 Brooklyn Park-Linthicum MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-673 1 Brooklyn Park-Linthicum MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-22   
443-673 2 Brooklyn Park-Linthicum MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-02-28   
443-673 3 Brooklyn Park-Linthicum MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-673 4 Brooklyn Park-Linthicum MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-02-25   
443-673 5 Brooklyn Park-Linthicum MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-09-23   
443-673 6 Brooklyn Park-Linthicum MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-673 7 Brooklyn Park-Linthicum MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-04-30   
443-673 8 Brooklyn Park-Linthicum MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2023-02-23   
443-673 9 Brooklyn Park-Linthicum MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-11-30   
443-674 A North East MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-674 0 North East MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-05-26   
443-674 1 North East MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238   2004-02-05   
443-674 2 North East MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-10-18   
443-674 3 North East MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2019-01-22   
443-674 4 North East MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-674 5 North East MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-674 6 North East MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2017-04-04   
443-674 7 North East MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2017-08-13   
443-674 8 North East MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-07-25   

<< 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 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 >>

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.