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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-478 2 Baltimore MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238   2010-01-30   
443-478 3 Baltimore MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-03-04   
443-478 4 Baltimore MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238   2010-03-04   
443-478 5 Baltimore MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238   2010-03-04   
443-478 6 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-05-03   
443-478 7 Baltimore MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2009-09-24   
443-478 8 Baltimore MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2009-09-24   
443-478 9 Baltimore MD BLTMMDSNDS6  281E YMAX COMMUNICATIONS CORP. - MD 238   2009-09-24   
443-479 A Waterloo (Washington DC LATA) MD LARLMDDYDS0  9212 VERIZON MARYLAND, INC. 236      
443-480 A Chestertown MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 0 Chestertown MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 1 Chestertown MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 2 Chestertown MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 3 Chestertown MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 4 Chestertown MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 5 Chestertown MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2004-01-18   
443-480 6 Chestertown MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 7 Chestertown MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2007-08-07   
443-480 8 Chestertown MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-03-05   
443-480 9 Chestertown MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-481 A Annapolis MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-481 0 Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-09-08   
443-481 1 Annapolis MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-481 2 Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2006-06-02   
443-481 3 Annapolis MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-481 4 Annapolis MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-481 5 Annapolis MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-481 6 Annapolis MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-481 7 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-09-12   
443-481 8 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-09-12   
443-481 9 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-07-06   
443-482 A Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-482 0 Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-482 1 Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-482 2 Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-482 3 Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-482 4 Annapolis MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2022-11-07   
443-482 5 Annapolis MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2006-11-03   
443-482 6 Annapolis MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2006-11-03   
443-482 7 Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-482 8 Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-482 9 Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-483 A Cardiff MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-483 0 Cardiff MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-02-25   
443-483 1 Cardiff MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-483 2 Cardiff MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-483 3 Cardiff MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-07   
443-483 4 Cardiff MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2004-02-07   
443-483 5 Cardiff MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-02-13   
443-483 6 Cardiff MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-07   

<< 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 >>

Last updated: Wed, 07 Feb 2024 04:12:25 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.