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
443-639 7 Hampstead MD   508J CENTURYLINK COMMUNICATIONS LLC 238   2014-06-12   
443-639 8 Hampstead MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-10-21   
443-639 9 Hampstead MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-10-21   
443-640 A Bel Air MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-640 0 Bel Air MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-640 1 Bel Air MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-640 2 Bel Air MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-640 3 Bel Air MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-640 4 Bel Air MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2008-04-30   
443-640 5 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-02-02   
443-640 6 Bel Air MD BLTMMDCH47Z  420C ARMSTRONG TELECOMMUNICATIONS, INC. - MD 238   2008-09-08   
443-640 7 Bel Air MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-03-16   
443-640 8 Bel Air MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-04-21   
443-640 9 Bel Air MD   073H TELNYX LLC 238   2021-03-04   
443-641 A Pikesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-641 0 Pikesville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-641 1 Pikesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-641 2 Pikesville MD OWMLMDOMDS0  9212 VERIZON MARYLAND, INC. 238   2004-10-10   
443-641 3 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-08-05   
443-641 4 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-08-05   
443-641 5 Pikesville MD OWMLMDOMDS0  9212 VERIZON MARYLAND, INC. 238   2004-10-10   
443-641 6 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-11-28   
443-641 7 Pikesville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-11-28   
443-641 8 Pikesville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-641 9 Pikesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-642 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-642 0 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-01-06   
443-642 1 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-03-11   
443-642 2 Baltimore MD BLTMMDCHDS2  9212 VERIZON MARYLAND, INC. 238   2007-01-08   
443-642 3 Baltimore MD BLTMMDCHDS2  9212 VERIZON MARYLAND, INC. 238   2007-01-08   
443-642 4 Baltimore MD BLTMMDCHDS2  9212 VERIZON MARYLAND, INC. 238   2007-01-08   
443-642 5 Baltimore MD BLTMMDCHDS2  9212 VERIZON MARYLAND, INC. 238   2007-01-08   
443-642 6 Baltimore MD BLTMMDCHDS2  9212 VERIZON MARYLAND, INC. 238   2007-01-08   
443-642 7 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-03-24   
443-642 8 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-03-24   
443-642 9 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-03-24   
443-643 A Bel Air MD BLARMDBLDS0  9212 VERIZON MARYLAND, INC. 238      
443-643 0 Bel Air MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-643 1 Bel Air MD BLARMDBLDS0  9212 VERIZON MARYLAND, INC. 238      
443-643 2 Bel Air MD BLARMDBLDS0  9212 VERIZON MARYLAND, INC. 238      
443-643 3 Bel Air MD BLARMDBLDS0  9212 VERIZON MARYLAND, INC. 238      
443-643 4 Bel Air MD BLARMDBLDS0  9212 VERIZON MARYLAND, INC. 238      
443-643 5 Bel Air MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-04-08   
443-643 6 Bel Air MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-04-08   
443-643 7 Bel Air MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-04-08   
443-643 8 Bel Air MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-04-08   
443-643 9 Bel Air MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-644 A Jarrettsville MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-644 0 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-10-22   
443-644 1 Jarrettsville MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - 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: LES.NET

Like this site? We accept donations via PayPal.