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
443-686 3 Fallston MD BLTMMDCH47Z  420C ARMSTRONG TELECOMMUNICATIONS, INC. - MD 238      
443-686 4 Fallston MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-686 6 Fallston MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-686 7 Fallston MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-686 8 Fallston MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-686 9 Fallston MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-687 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-687 0 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-687 1 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-687 2 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-687 3 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-687 4 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-687 5 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-687 6 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-687 7 Baltimore MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-687 8 Baltimore MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-687 9 Baltimore MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-688 A Severn MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-688 0 Severn MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-688 1 Severn MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-688 2 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-688 3 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-688 4 Severn MD   145J TERRA NOVA TELECOM INC. 238      
443-688 5 Severn MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-688 6 Severn MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-688 7 Severn MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-688 8 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-688 9 Severn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-689 A Cockeysville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-689 0 Cockeysville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-689 1 Cockeysville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
443-689 2 Cockeysville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-689 3 Cockeysville MD BLTQMD012MD  964H BARR TELL USA, INC. 238      
443-689 4 Cockeysville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-689 5 Cockeysville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-689 7 Cockeysville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-689 8 Cockeysville MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238      
443-689 9 Cockeysville MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
443-690 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-691 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-692 A Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 0 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 1 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 2 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 3 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 4 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 5 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 6 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-692 7 Baltimore MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-692 8 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-692 9 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-693 A Perryville MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-693 0 Perryville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-693 1 Perryville MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-693 2 Perryville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-693 3 Perryville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-693 4 Perryville MD BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-693 5 Perryville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-693 6 Perryville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-693 7 Perryville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-693 8 Perryville MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-693 9 Perryville MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-694 A Severna Park MD   5562 METROPCS, INC. 238      
443-694 0 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 1 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 2 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 3 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 4 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 5 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 6 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 7 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 8 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-694 9 Severna Park MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-695 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-696 A Dundalk MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-696 0 Dundalk MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-696 1 Dundalk MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
443-696 2 Dundalk MD   145J TERRA NOVA TELECOM INC. 238      
443-696 3 Dundalk MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-696 4 Dundalk MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-696 5 Dundalk MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
443-696 6 Dundalk MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-696 7 Dundalk MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-696 8 Dundalk MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-696 9 Dundalk MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-697 A Catonsville MD BLTMMDDN4MD  2554 GLOBAL NAPS SOUTH, INC. - MD 238      
443-698 A Odenton MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-698 0 Odenton MD BLTQMD012MD  964H BARR TELL USA, INC. 238      
443-698 1 Odenton MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-698 2 Odenton MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-698 3 Odenton MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-698 4 Odenton MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-698 5 Odenton MD   876D ONVOY, LLC - MD 238      
443-698 6 Odenton MD   876D ONVOY, LLC - MD 238      
443-698 7 Odenton MD   145J TERRA NOVA TELECOM INC. 238      
443-698 8 Odenton MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-698 9 Odenton MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-699 A Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-699 0 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-699 1 Annapolis MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      

<< 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: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.