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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-480 5 Chestertown MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2004-01-18   
443-480 6 Chestertown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 7 Chestertown MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2007-08-07   
443-480 8 Chestertown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-03-05   
443-480 9 Chestertown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-481 A Annapolis MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-481 0 Annapolis MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-09-08   
443-481 1 Annapolis MD   829J PAETEC ITEL, LLC 238      
443-481 2 Annapolis MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2006-06-02   
443-481 3 Annapolis MD   829J PAETEC ITEL, LLC 238      
443-481 4 Annapolis MD   829J PAETEC ITEL, LLC 238      
443-481 5 Annapolis MD   829J PAETEC ITEL, LLC 238      
443-481 6 Annapolis MD   829J PAETEC ITEL, LLC 238      
443-481 7 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-09-12   
443-481 8 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-09-12   
443-481 9 Annapolis MD   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   9212 VERIZON MARYLAND, INC. 238      
443-482 1 Annapolis MD   9212 VERIZON MARYLAND, INC. 238      
443-482 2 Annapolis MD   9212 VERIZON MARYLAND, INC. 238      
443-482 3 Annapolis MD   9212 VERIZON MARYLAND, INC. 238      
443-482 4 Annapolis MD   145J TERRA NOVA TELECOM INC. 238   2022-11-07   
443-482 5 Annapolis MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2006-11-03   
443-482 6 Annapolis MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2006-11-03   
443-482 7 Annapolis MD   9212 VERIZON MARYLAND, INC. 238      
443-482 8 Annapolis MD   9212 VERIZON MARYLAND, INC. 238      
443-482 9 Annapolis MD   9212 VERIZON MARYLAND, INC. 238      
443-483 A Cardiff MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-483 0 Cardiff MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-02-25   
443-483 1 Cardiff MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-483 2 Cardiff MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-483 3 Cardiff MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-07   
443-483 4 Cardiff MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2004-02-07   
443-483 5 Cardiff MD   624H ONVOY SPECTRUM, LLC 238   2022-02-13   
443-483 6 Cardiff MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-07   
443-483 7 Cardiff MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-03-07   
443-483 8 Cardiff MD   145J TERRA NOVA TELECOM INC. 238   2021-01-27   
443-483 9 Cardiff MD   624H ONVOY SPECTRUM, LLC 238   2022-02-13   
443-484 A Edgewood MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-484 0 Edgewood MD   876D ONVOY, LLC - MD 238   2021-07-11   
443-484 1 Edgewood MD   073H TELNYX LLC 238   2017-03-14   
443-484 2 Edgewood MD   318J COMCAST IP PHONE, LLC 238   2007-12-05   
443-484 3 Edgewood MD   5562 METROPCS, INC. 238   2014-12-24   
443-484 4 Edgewood MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-484 5 Edgewood MD   5562 METROPCS, INC. 238   2014-12-22   
443-484 6 Edgewood MD   5562 METROPCS, INC. 238   2015-12-27   
443-484 7 Edgewood MD   318J COMCAST IP PHONE, LLC 238   2014-10-24   
443-484 8 Edgewood MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-05-29   
443-484 9 Edgewood MD   624H ONVOY SPECTRUM, LLC 238   2022-01-27   
443-485 A Elkton MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.