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
443-495 2 Parkville MD   318J COMCAST IP PHONE, LLC 238   2016-05-18   
443-495 3 Parkville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-07-31   
443-495 4 Parkville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-09-29   
443-495 5 Parkville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-09-12   
443-495 6 Parkville MD   876D ONVOY, LLC - MD 238   2018-05-27   
443-495 7 Parkville MD   318J COMCAST IP PHONE, LLC 238   2015-09-25   
443-495 8 Parkville MD   964H BARR TELL USA, INC. 238   2016-12-17   
443-495 9 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-08-14   
443-496 A Easton MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-496 0 Easton MD   5562 METROPCS, INC. 242      
443-496 1 Easton MD   5562 METROPCS, INC. 242      
443-496 2 Easton MD   5562 METROPCS, INC. 242      
443-496 3 Easton MD   876D ONVOY, LLC - MD 242   2018-07-19   
443-496 4 Easton MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-496 5 Easton MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2014-06-30   
443-496 6 Easton MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-496 7 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-496 8 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-496 9 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-497 A Salisbury MD SLBRMDSCXMD  5562 METROPCS, INC. 242      
443-497 0 Salisbury MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-497 1 Salisbury MD   5562 METROPCS, INC. 242      
443-497 2 Salisbury MD   5562 METROPCS, INC. 242      
443-497 3 Salisbury MD   5562 METROPCS, INC. 242      
443-497 4 Salisbury MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-497 5 Salisbury MD   5562 METROPCS, INC. 242   2007-10-19   
443-497 6 Salisbury MD   5562 METROPCS, INC. 242      
443-497 7 Salisbury MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-02   
443-497 8 Salisbury MD   5562 METROPCS, INC. 242   2007-03-13   
443-497 9 Salisbury MD   5562 METROPCS, INC. 242   2007-03-13   
443-498 A Catonsville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-498 0 Catonsville MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-498 1 Catonsville MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-498 2 Catonsville MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-498 3 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-498 4 Catonsville MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-498 5 Catonsville MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-498 6 Catonsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-498 7 Catonsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-498 8 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-498 9 Catonsville MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-499 A Jarrettsville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-499 2 Jarrettsville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-03-12   
443-499 3 Jarrettsville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-499 5 Jarrettsville MD   876D ONVOY, LLC - MD 238   2023-10-22   
443-499 6 Jarrettsville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-22   
443-499 7 Jarrettsville MD   508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-499 8 Jarrettsville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-22   
443-499 9 Jarrettsville MD   876D ONVOY, LLC - MD 238   2012-10-07   
443-500 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 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: Execulink Telecom

Like this site? We accept donations via PayPal.