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
443-356 4 Bel Air MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-356 5 Bel Air MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-06-23   
443-356 6 Bel Air MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-06-26   
443-356 7 Bel Air MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-10-25   
443-356 8 Bel Air MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-11   
443-356 9 Bel Air MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-10-11   
443-357 A Pikesville MD PIVLMDPKDS1  9212 VERIZON MARYLAND, INC. 238      
443-357 0 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-22   
443-357 1 Pikesville MD PIVLMDPKDS1  9212 VERIZON MARYLAND, INC. 238      
443-357 2 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-22   
443-357 3 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-22   
443-357 4 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-357 5 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-22   
443-357 6 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-22   
443-357 7 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-357 8 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-22   
443-357 9 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-22   
443-358 A Salisbury MD SLBRMDSC9MD  281E YMAX COMMUNICATIONS CORP. - MD 242      
443-358 0 Salisbury MD SLBRMDSC9MD  281E YMAX COMMUNICATIONS CORP. - MD 242   2011-04-03   
443-358 1 Salisbury MD SLBRMDSC9MD  281E YMAX COMMUNICATIONS CORP. - MD 242   2011-04-03   
443-358 2 Salisbury MD SLBRMDSC9MD  281E YMAX COMMUNICATIONS CORP. - MD 242   2011-04-03   
443-358 3 Salisbury MD SLBRMDSC9MD  281E YMAX COMMUNICATIONS CORP. - MD 242   2011-04-03   
443-358 4 Salisbury MD SLBRMDSC9MD  281E YMAX COMMUNICATIONS CORP. - MD 242   2011-04-03   
443-358 5 Salisbury MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2014-03-24   
443-358 6 Salisbury MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2017-08-31   
443-358 7 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242   2017-10-02   
443-358 8 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2011-10-10   
443-358 9 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2011-10-10   
443-359 A Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-359 0 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-359 1 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-359 2 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-359 3 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-359 4 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-11-15   
443-359 5 Delmar MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2006-07-31   
443-359 6 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-12-14   
443-359 7 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-01-23   
443-359 8 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-359 9 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-360 A Aberdeen MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 236      
443-360 0 Aberdeen MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-02-27   
443-360 1 Aberdeen MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2011-10-06   
443-360 2 Aberdeen MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2011-10-06   
443-360 3 Aberdeen MD BLTMMDCH42Z  876D ONVOY, LLC - MD 236   2012-02-29   
443-360 4 Aberdeen MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 236   2008-01-17   
443-360 5 Aberdeen MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-07-02   
443-360 6 Aberdeen MD ABRDMDABDS0  9212 VERIZON MARYLAND, INC. 236   2008-01-31   
443-360 7 Aberdeen MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2010-09-05   
443-360 8 Aberdeen MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2010-09-05   
443-360 9 Aberdeen MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 236      
443-361 A Sykesville MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-362 A Easton MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-362 0 Easton MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-362 1 Easton MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2016-07-14   
443-362 2 Easton MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-362 3 Easton MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2018-09-20   
443-362 4 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-362 5 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-362 6 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-362 7 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-362 8 Easton MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2015-03-16   
443-362 9 Easton MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2014-03-22   
443-363 A Severn MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-363 0 Severn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-04-14   
443-363 1 Severn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-04-14   
443-363 2 Severn MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-23   
443-363 3 Severn MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2019-03-31   
443-363 4 Severn MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-363 5 Severn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-04-14   
443-363 6 Severn MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-363 7 Severn MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2018-10-05   
443-363 8 Severn MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-25   
443-363 9 Severn MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2020-12-31   
443-364 A Ellicott City MD CLMAMDNIDS1  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-364 0 Ellicott City MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-08-27   
443-364 1 Ellicott City MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2018-04-29   
443-364 2 Ellicott City MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2007-05-23   
443-364 3 Ellicott City MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-02-29   
443-364 4 Ellicott City MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2008-07-26   
443-364 5 Ellicott City MD CLMAMDNIDS1  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-364 6 Ellicott City MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2009-02-11   
443-364 7 Ellicott City MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2009-02-11   
443-364 8 Ellicott City MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-364 9 Ellicott City MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2007-07-27   
443-365 A Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-365 0 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-365 1 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-365 2 Salisbury MD SLBRMDSBXFX  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2008-03-13   
443-365 3 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-12-04   
443-365 4 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-10-03   
443-365 5 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-10-03   
443-365 6 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-365 7 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2009-02-02   
443-365 8 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2013-12-09   
443-365 9 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-366 A Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-366 0 Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-366 1 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-366 2 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2004-09-02   
443-366 3 Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242      

<< 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: VoIP Much Phone Company

Like this site? We accept donations via PayPal.