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 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-449 A Baltimore MD PIVLMDPKFMD  9170 BROADVIEW NETWORKS, INC. - MD 238   2007-05-19   
443-449 0 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2007-07-22   
443-449 1 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2007-07-22   
443-449 2 Baltimore MD   9170 BROADVIEW NETWORKS, INC. - MD 238   2007-05-19   
443-449 3 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2008-04-08   
443-449 4 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2008-06-16   
443-449 5 Baltimore MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2007-07-27   
443-449 6 Baltimore MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2007-07-27   
443-449 7 Baltimore MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2007-07-27   
443-449 8 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2007-08-17   
443-449 9 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2007-08-17   
443-450 A Pikesville MD BLTMMDSNRS0  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-450 0 Pikesville MD   964H BARR TELL USA, INC. 238   2016-12-17   
443-450 1 Pikesville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2012-07-29   
443-450 3 Pikesville MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2013-07-17   
443-450 4 Pikesville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-450 5 Pikesville MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2015-09-14   
443-450 6 Pikesville MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2018-02-01   
443-450 7 Pikesville MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2019-07-05   
443-450 8 Pikesville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2014-12-13   
443-450 9 Pikesville MD   876D ONVOY, LLC - MD 238   2016-01-14   
443-451 A Baltimore MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-452 A Baltimore MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238   2005-10-30   
443-452 0 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2006-02-07   
443-452 1 Baltimore MD   2589 US LEC OF MARYLAND, INC. 238   2005-10-30   
443-452 2 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2005-10-31   
443-452 3 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2005-10-31   
443-452 4 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2005-10-31   
443-452 5 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2005-10-31   
443-452 6 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2006-02-07   
443-452 7 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-02-03   
443-452 8 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-02-03   
443-452 9 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-02-03   
443-453 A Baltimore MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2007-12-03   
443-453 0 Baltimore MD   876D ONVOY, LLC - MD 238   2007-12-03   
443-453 1 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2008-06-16   
443-453 2 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2008-06-16   
443-453 3 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2008-06-16   
443-453 4 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2008-06-16   
443-453 5 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-05-16   
443-453 6 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2008-06-16   
443-453 7 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2008-06-16   
443-453 8 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2008-06-16   
443-453 9 Baltimore MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2008-06-09   
443-454 A Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238      
443-454 0 Annapolis MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238      
443-454 1 Annapolis MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-06-02   
443-454 2 Annapolis MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238      
443-454 3 Annapolis MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238      
443-454 4 Annapolis MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 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 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 >>

Last updated: Sun, 31 May 2020 11:59:01 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.