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
443-731 8 Port Deposit MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-731 9 Port Deposit MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-732 A Silver Run MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-732 0 Silver Run MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-732 1 Silver Run MD   829J PAETEC ITEL, LLC 238   2004-02-05   
443-732 2 Silver Run MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-08   
443-732 3 Silver Run MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-08   
443-732 4 Silver Run MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-732 5 Silver Run MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-23   
443-732 6 Silver Run MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-01-19   
443-732 7 Silver Run MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-732 8 Silver Run MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-732 9 Silver Run MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-733 A Waterloo MD CLMAMDNIDS1  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-733 0 Waterloo MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2003-02-16   
443-733 1 Waterloo MD   829J PAETEC ITEL, LLC 238   2003-03-04   
443-733 2 Waterloo MD   829J PAETEC ITEL, LLC 238   2009-03-17   
443-733 3 Waterloo MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-733 4 Waterloo MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-28   
443-733 5 Waterloo MD   829J PAETEC ITEL, LLC 238   2013-10-10   
443-733 6 Waterloo MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-28   
443-733 7 Waterloo MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
443-733 8 Waterloo MD   515J IP HORIZON LLC 238   2016-05-31   
443-733 9 Waterloo MD CLMAMDNIDS1  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-734 A Severn MD ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
443-734 0 Severn MD   515J IP HORIZON LLC 238   2013-09-06   
443-734 1 Severn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-06   
443-734 2 Severn MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2015-03-06   
443-734 3 Severn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-01-22   
443-734 4 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-04-02   
443-734 5 Severn MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2015-03-13   
443-734 6 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-11-11   
443-734 7 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-05-29   
443-734 8 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-05-29   
443-734 9 Severn MD ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
443-735 A Salisbury MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-736 A Salisbury MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-736 0 Salisbury MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-736 1 Salisbury MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2013-07-21   
443-736 2 Salisbury MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2011-04-16   
443-736 3 Salisbury MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2008-03-26   
443-736 4 Salisbury MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2008-03-26   
443-736 5 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2011-10-11   
443-736 6 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2010-05-03   
443-736 7 Salisbury MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2007-10-29   
443-736 8 Salisbury MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2007-10-29   
443-736 9 Salisbury MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-737 A Waterloo MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-737 0 Waterloo MD   829J PAETEC ITEL, LLC 238      
443-737 1 Waterloo MD   829J PAETEC ITEL, LLC 238      
443-737 2 Waterloo MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-07-16   
443-737 3 Waterloo MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
443-737 4 Waterloo MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2004-02-07   
443-737 5 Waterloo MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
443-737 6 Waterloo MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-21   
443-737 7 Waterloo MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-21   
443-737 8 Waterloo MD   515J IP HORIZON LLC 238   2015-03-21   
443-737 9 Waterloo MD   829J PAETEC ITEL, LLC 238      
443-738 A Pikesville MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-738 0 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-738 1 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-738 2 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-738 3 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-738 4 Pikesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-09-01   
443-738 5 Pikesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-09-01   
443-738 6 Pikesville MD BLTMMDCHDMD  551G NUSO, LLC 238   2016-08-31   
443-738 7 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-738 8 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-738 9 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-739 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-740 A Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-740 0 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-03-28   
443-740 1 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-03-28   
443-740 2 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-03-20   
443-740 3 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-03-28   
443-740 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-03-28   
443-740 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-03-28   
443-740 6 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-12-31   
443-740 7 Baltimore MD BLTQMD019MD  490J DISH WIRELESS, LLC 238   2024-07-20   
443-740 8 Baltimore MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2024-10-23   
443-740 9 Baltimore MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2005-08-03   
443-741 A Columbia MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-741 0 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-08-08   
443-741 1 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-05-20   
443-741 2 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-20   
443-741 3 Columbia MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-05-13   
443-741 4 Columbia MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2012-05-05   
443-741 5 Columbia MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2013-06-14   
443-741 6 Columbia MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2013-06-14   
443-741 7 Columbia MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-08-01   
443-741 8 Columbia MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-741 9 Columbia MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-742 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-743 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-743 0 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-05-29   
443-743 1 Baltimore MD   829J PAETEC ITEL, LLC 238   2008-07-09   
443-743 2 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-07-18   
443-743 3 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-07-18   
443-743 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-08-18   
443-743 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-08-18   

<< 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: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.