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
443-962 6 Glen Burnie MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-13   
443-962 7 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-03-03   
443-962 8 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-04-21   
443-962 9 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-04-21   
443-963 A Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-963 0 Baltimore MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-10-19   
443-963 1 Baltimore MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2015-12-26   
443-963 2 Baltimore MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2012-03-25   
443-963 3 Baltimore MD   876D ONVOY, LLC - MD 238   2012-05-19   
443-963 4 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-24   
443-963 5 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-24   
443-963 6 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-24   
443-963 7 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-24   
443-963 8 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-24   
443-963 9 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-07-15   
443-964 A North Beach MD BLTMMDSNRS0  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-07-03   
443-964 0 North Beach MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-964 1 North Beach MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-17   
443-964 2 North Beach MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2006-07-31   
443-964 3 North Beach MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2010-02-01   
443-964 4 North Beach MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2008-03-07   
443-964 5 North Beach MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2011-06-28   
443-964 6 North Beach MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2012-07-08   
443-964 7 North Beach MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-964 8 North Beach MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2007-01-22   
443-964 9 North Beach MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-01-02   
443-965 A Baltimore MD   6664 SPRINT SPECTRUM L.P. 238      
443-965 0 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2006-08-28   
443-965 1 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2006-08-28   
443-965 2 Baltimore MD   9212 VERIZON MARYLAND, INC. 238   2006-08-31   
443-965 3 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2006-08-23   
443-965 4 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2006-08-23   
443-965 5 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2006-08-23   
443-965 6 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2006-08-23   
443-965 7 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2006-08-23   
443-965 8 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2006-08-23   
443-965 9 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2010-08-09   
443-966 A Fallston MD WDLWMDEMCM3  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-11-06   
443-966 0 Fallston MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-11-06   
443-966 1 Fallston MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-02-16   
443-966 2 Fallston MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-08-01   
443-966 3 Fallston MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-01-09   
443-966 4 Fallston MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-02-03   
443-966 5 Fallston MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2012-07-02   
443-966 8 Fallston MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-966 9 Fallston MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-967 A North East MD NRTEMDNERS0  9212 VERIZON MARYLAND, INC. 238      
443-967 0 North East MD   9212 VERIZON MARYLAND, INC. 238      
443-967 1 North East MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-967 2 North East MD   228C IDT AMERICA CORP - MD 238   2012-01-08   

<< 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, 10 Nov 2019 13:49:34 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.