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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-469 5 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-26   
443-469 6 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-26   
443-469 7 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-26   
443-469 8 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-26   
443-469 9 Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-05-26   
443-470 A Towson MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-470 0 Towson MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-08-18   
443-470 1 Towson MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238   2008-07-03   
443-470 2 Towson MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-10-23   
443-470 3 Towson MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-04-29   
443-470 4 Towson MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238   2010-05-21   
443-470 5 Towson MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-06-26   
443-470 6 Towson MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-20   
443-470 7 Towson MD BLTOMDKHDS0  7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2011-12-01   
443-470 8 Towson MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2009-08-13   
443-470 9 Towson MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-471 A Pikesville MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-471 0 Pikesville MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-471 1 Pikesville MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-471 2 Pikesville MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-471 3 Pikesville MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-471 4 Pikesville MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-471 5 Pikesville MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-471 6 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2007-08-07   
443-471 7 Pikesville MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-471 8 Pikesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2007-09-25   
443-472 A Columbia MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-472 0 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-06-03   
443-472 1 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2003-11-19   
443-472 2 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2003-11-03   
443-472 3 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-08-02   
443-472 4 Columbia MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-472 5 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-11-04   
443-472 6 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2005-01-02   
443-472 7 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-02-28   
443-472 8 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2005-01-02   
443-472 9 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2005-11-01   
443-473 A Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238      
443-473 0 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2007-05-19   
443-473 1 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2007-05-19   
443-473 2 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2007-05-19   
443-473 3 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2007-05-19   
443-473 4 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2007-05-19   
443-473 5 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2007-05-19   
443-473 6 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2007-05-19   
443-473 7 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2007-05-19   
443-473 8 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2007-05-19   
443-473 9 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2007-05-19   
443-474 A Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-475 A Baltimore MD BLTOMDKHDS0  7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 >>

Last updated: Sun, 28 Feb 2021 19:06:05 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.