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
443-741 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   
443-743 6 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-08-18   
443-743 7 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-08-18   
443-743 8 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-08-18   
443-743 9 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-07-03   
443-744 A Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2024-02-09   
443-744 0 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-744 1 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-744 2 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-744 3 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-744 4 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-744 5 Reisterstown MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-744 6 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-744 7 Reisterstown MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-744 8 Reisterstown MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2017-01-20   
443-744 9 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-745 A Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-746 A Easton MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242      
443-746 0 Easton MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2010-02-20   
443-746 1 Easton MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2021-09-21   
443-746 2 Easton MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2014-10-23   
443-746 3 Easton MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242      
443-746 4 Easton MD ESTNMDES5MD  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 242   2015-09-01   
443-746 5 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-746 6 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-746 7 Easton MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2020-04-30   
443-746 8 Easton MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2020-04-30   
443-746 9 Easton MD SLBRMDSBXMD  073H TELNYX LLC 242   2022-08-01   
443-747 A Port Deposit MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-747 0 Port Deposit MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-747 1 Port Deposit MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-18   
443-747 2 Port Deposit MD   829J PAETEC ITEL, LLC 238   2004-02-05   
443-747 3 Port Deposit MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-747 4 Port Deposit MD BLTMMDCH3MD  228C IDT AMERICA, CORP. - MD 238   2012-01-08   
443-747 5 Port Deposit MD BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2006-05-04   
443-747 6 Port Deposit MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-747 7 Port Deposit MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-08   
443-747 8 Port Deposit MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-747 9 Port Deposit MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-748 A Millersville MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-748 0 Millersville MD   829J PAETEC ITEL, LLC 238      
443-748 1 Millersville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-04-02   
443-748 2 Millersville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-748 3 Millersville MD   829J PAETEC ITEL, LLC 238      
443-748 4 Millersville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-748 5 Millersville MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-02-05   
443-748 6 Millersville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-748 7 Millersville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-748 9 Millersville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2022-11-23   
443-749 A Glen Burnie MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-749 0 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-749 1 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-749 2 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-749 3 Glen Burnie MD BLTMMDCHXQX  197D VONAGE AMERICA LLC 238   2020-05-13   
443-749 4 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-749 5 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-749 6 Glen Burnie MD BLTMMDCHXQX  197D VONAGE AMERICA LLC 238   2020-05-13   
443-749 7 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-749 8 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-749 9 Glen Burnie MD   829J PAETEC ITEL, LLC 238      
443-750 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-750 0 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-08-06   
443-750 1 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-08-09   
443-750 2 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-08-09   
443-750 3 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-750 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-750 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-750 6 Baltimore MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2010-08-25   
443-750 7 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-750 8 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-750 9 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-751 A Woodlawn MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-751 0 Woodlawn MD   829J PAETEC ITEL, LLC 238      
443-751 1 Woodlawn MD   829J PAETEC ITEL, LLC 238      
443-751 2 Woodlawn MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
443-751 3 Woodlawn MD   829J PAETEC ITEL, LLC 238      
443-751 4 Woodlawn MD   829J PAETEC ITEL, LLC 238      
443-751 5 Woodlawn MD   829J PAETEC ITEL, LLC 238      
443-751 6 Woodlawn MD   829J PAETEC ITEL, LLC 238      
443-751 7 Woodlawn MD   829J PAETEC ITEL, LLC 238      
443-751 8 Woodlawn MD   829J PAETEC ITEL, LLC 238      
443-751 9 Woodlawn MD   829J PAETEC ITEL, LLC 238      
443-752 A Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-752 0 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-03-03   
443-752 1 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-03-21   
443-752 2 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-10-02   
443-752 3 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-12-29   
443-752 4 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-06-04   

<< 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, 18 Jun 2025 02:30:00 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.