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
443-675 5 Randallstown MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-675 6 Randallstown MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-02   
443-675 7 Randallstown MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-02   
443-675 8 Randallstown MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-02-04   
443-675 9 Randallstown MD BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-676 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-677 A Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238      
443-678 A Parkville MD WHMRMDWMRS2  9212 VERIZON MARYLAND, INC. 238      
443-678 0 Parkville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-08-31   
443-678 1 Parkville MD WHMRMDWMRS2  9212 VERIZON MARYLAND, INC. 238      
443-678 2 Parkville MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2016-02-05   
443-678 3 Parkville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-06-11   
443-678 4 Parkville MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC. - MD 238   2019-05-01   
443-678 5 Parkville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-06-16   
443-678 6 Parkville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-06-16   
443-678 7 Parkville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-06-16   
443-678 8 Parkville MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-11-27   
443-678 9 Parkville MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-11-27   
443-679 A Severn MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-679 0 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2020-04-22   
443-679 1 Severn MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238   2002-04-22   
443-679 2 Severn MD BLTMMDCHFMD  5562 METRO PCS, INC. 238   2018-02-08   
443-679 3 Severn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-679 4 Severn MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2016-12-15   
443-679 5 Severn MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-06-18   
443-679 6 Severn MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-05-31   
443-679 7 Severn MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2015-06-11   
443-679 8 Severn MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2014-06-04   
443-679 9 Severn MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-680 A Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238      
443-680 0 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 1 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 2 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 3 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 4 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 5 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 6 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 7 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 8 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 9 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-681 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-681 0 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-08-07   
443-681 1 Baltimore MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238   2010-12-06   
443-681 2 Baltimore MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238   2010-12-06   
443-681 3 Baltimore MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238   2010-12-06   
443-681 4 Baltimore MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238   2010-12-06   
443-681 5 Baltimore MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238   2010-12-06   
443-681 6 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2010-04-04   
443-681 7 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2010-04-04   
443-681 8 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-03   

<< 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: ISP Telecom

Like this site? We accept donations via PayPal.