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
443-675 0 Randallstown MD   7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-675 1 Randallstown MD   7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-675 2 Randallstown MD   7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-675 3 Randallstown MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-10-23   
443-675 4 Randallstown MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-10-23   
443-675 5 Randallstown MD   964H BARR TELL USA, INC. 238   2016-12-17   
443-675 6 Randallstown MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-02   
443-675 7 Randallstown MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-06-02   
443-675 8 Randallstown MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-02-04   
443-675 9 Randallstown MD   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   6664 SPRINT SPECTRUM L.P. 238      
443-678 A Parkville MD WHMRMDWMRS2  9212 VERIZON MARYLAND, INC. 238      
443-678 0 Parkville MD   876D ONVOY, LLC - MD 238   2014-08-31   
443-678 1 Parkville MD   9212 VERIZON MARYLAND, INC. 238      
443-678 2 Parkville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2016-02-05   
443-678 3 Parkville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-06-11   
443-678 4 Parkville MD   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   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-11-27   
443-678 9 Parkville MD   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 1 Severn MD   2589 US LEC OF MARYLAND, INC. 238   2002-04-22   
443-679 2 Severn MD   5562 METRO PCS, INC. 238   2018-02-08   
443-679 3 Severn MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-14   
443-679 4 Severn MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2016-12-15   
443-679 5 Severn MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-06-18   
443-679 6 Severn MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-05-31   
443-679 7 Severn MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2015-06-11   
443-679 8 Severn MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2014-06-04   
443-679 9 Severn MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-680 A Baltimore MD HNVAMDAYCM2  6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 0 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 1 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 2 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 3 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 4 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 5 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 6 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 7 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 8 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-680 9 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2010-11-25   
443-681 A Baltimore MD CTVLMDBACM3  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-08-07   
443-681 0 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-08-07   
443-681 1 Baltimore MD   4773 XO MARYLAND, LLC 238   2010-12-06   
443-681 2 Baltimore MD   4773 XO MARYLAND, LLC 238   2010-12-06   
443-681 3 Baltimore MD   4773 XO MARYLAND, LLC 238   2010-12-06   
443-681 4 Baltimore MD   4773 XO MARYLAND, LLC 238   2010-12-06   

<< 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: Wed, 05 Feb 2020 02:15:44 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.