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
443-490 3 Edgewood MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2016-08-04   
443-490 4 Edgewood MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-490 5 Edgewood MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-11-30   
443-490 6 Edgewood MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-10-19   
443-490 7 Edgewood MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-10-19   
443-490 8 Edgewood MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-490 9 Edgewood MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2017-10-14   
443-491 A Parkton MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-491 2 Parkton MD PIVLMDPKFMD  5966 LIGHTWAVE COMMUNICATIONS, LLC - MD 238   2005-10-07   
443-491 3 Parkton MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-491 4 Parkton MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-491 7 Parkton MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2020-09-04   
443-491 8 Parkton MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-11-18   
443-491 9 Parkton MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   
443-492 A Elkridge MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-492 0 Elkridge MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-10-12   
443-492 2 Elkridge MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-12   
443-492 3 Elkridge MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-12   
443-492 4 Elkridge MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-492 5 Elkridge MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-492 6 Elkridge MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238   2008-08-01   
443-492 7 Elkridge MD   145J TERRA NOVA TELECOM INC. 238   2023-04-29   
443-492 8 Elkridge MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2011-03-15   
443-492 9 Elkridge MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-493 A Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-493 0 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2009-05-07   
443-493 1 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2011-10-28   
443-493 2 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2011-10-28   
443-493 3 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2011-10-28   
443-493 4 Delmar MD SLBRMD906MD  145J TERRA NOVA TELECOM INC. 242   2024-02-15   
443-493 5 Delmar MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-06-17   
443-493 6 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2024-02-18   
443-493 7 Delmar MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2017-04-13   
443-493 8 Delmar MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2021-04-02   
443-493 9 Delmar MD SLBRMD902MD  073H TELNYX LLC 242   2017-09-13   
443-494 A Millersville MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-494 2 Millersville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   
443-494 3 Millersville MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-494 4 Millersville MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-494 5 Millersville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-04-02   
443-494 6 Millersville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-07-06   
443-494 7 Millersville MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-494 8 Millersville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   
443-494 9 Millersville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-495 A Parkville MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-495 0 Parkville MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-10-12   
443-495 2 Parkville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2016-05-18   
443-495 3 Parkville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-07-31   
443-495 4 Parkville MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-495 5 Parkville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-09-12   
443-495 6 Parkville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2018-05-27   
443-495 7 Parkville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2015-09-25   
443-495 8 Parkville MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-495 9 Parkville MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-08-14   
443-496 A Easton MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-496 0 Easton MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-496 1 Easton MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-496 2 Easton MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-496 3 Easton MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2018-07-19   
443-496 4 Easton MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-496 5 Easton MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2014-06-30   
443-496 6 Easton MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-496 7 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-496 8 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-496 9 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-497 A Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-497 0 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-497 1 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-497 2 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-497 3 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-497 4 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-497 5 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2007-10-19   
443-497 6 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-497 7 Salisbury MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-02   
443-497 8 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2007-03-13   
443-497 9 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2007-03-13   
443-498 A Catonsville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-498 0 Catonsville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-498 1 Catonsville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-498 2 Catonsville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-498 3 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-498 4 Catonsville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-498 5 Catonsville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-498 6 Catonsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-498 7 Catonsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-498 8 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-498 9 Catonsville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-499 A Jarrettsville MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-499 2 Jarrettsville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-03-12   
443-499 3 Jarrettsville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-499 4 Jarrettsville MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-499 5 Jarrettsville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2023-10-22   
443-499 6 Jarrettsville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-22   
443-499 7 Jarrettsville MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-499 8 Jarrettsville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-22   
443-499 9 Jarrettsville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   
443-500 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-500 0 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-06-09   
443-500 1 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-06-09   
443-500 2 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-06-09   

<< 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: ISP Telecom

Like this site? We accept donations via PayPal.