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
443-258 A Easton MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-258 0 Easton MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-258 1 Easton MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2016-07-02   
443-258 2 Easton MD   829J PAETEC ITEL, LLC 242   2012-07-26   
443-258 3 Easton MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2017-10-20   
443-258 4 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-10-22   
443-258 5 Easton MD   876D ONVOY, LLC - MD 242   2024-06-07   
443-258 6 Easton MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 242   2012-07-13   
443-258 7 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-10-22   
443-258 8 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-04-12   
443-258 9 Easton MD   568G PEERLESS NETWORK OF MARYLAND, LLC 242   2017-03-02   
443-259 A Columbia MD CLMAMDOBDS0  9212 VERIZON MARYLAND, INC. 238      
443-259 0 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 1 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 2 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 3 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 4 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 5 Columbia MD   829J PAETEC ITEL, LLC 238   2013-09-05   
443-259 6 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 7 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 8 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
443-259 9 Columbia MD   829J PAETEC ITEL, LLC 238   2003-02-25   
443-260 A Salisbury MD SLBRMDSBDS1  9212 VERIZON MARYLAND, INC. 242      
443-260 0 Salisbury MD   9212 VERIZON MARYLAND, INC. 242      
443-260 1 Salisbury MD   9212 VERIZON MARYLAND, INC. 242      
443-260 2 Salisbury MD   9212 VERIZON MARYLAND, INC. 242      
443-260 3 Salisbury MD   9212 VERIZON MARYLAND, INC. 242      
443-260 4 Salisbury MD   9212 VERIZON MARYLAND, INC. 242      
443-260 5 Salisbury MD   9212 VERIZON MARYLAND, INC. 242      
443-260 6 Salisbury MD   9212 VERIZON MARYLAND, INC. 242      
443-260 7 Salisbury MD   9212 VERIZON MARYLAND, INC. 242      
443-260 8 Salisbury MD   9212 VERIZON MARYLAND, INC. 242      
443-260 9 Salisbury MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2011-10-10   
443-261 A Severna Park MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-261 0 Severna Park MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-09-24   
443-261 1 Severna Park MD   829J PAETEC ITEL, LLC 238   2002-04-17   
443-261 2 Severna Park MD   829J PAETEC ITEL, LLC 238   2010-08-06   
443-261 3 Severna Park MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-261 4 Severna Park MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-09-04   
443-261 5 Severna Park MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
443-261 6 Severna Park MD   5562 METROPCS, INC. 238   2010-11-12   
443-261 7 Severna Park MD   5562 METROPCS, INC. 238   2010-11-12   
443-261 8 Severna Park MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-11-12   
443-261 9 Severna Park MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-11-12   
443-262 A Centreville MD CNVLMDCTRS2  9212 VERIZON MARYLAND, INC. 242      
443-262 0 Centreville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2012-08-27   
443-262 1 Centreville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2004-01-18   
443-262 2 Centreville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2004-02-28   
443-262 3 Centreville MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2004-04-02   
443-262 4 Centreville MD   9212 VERIZON MARYLAND, INC. 242   2004-06-21   

<< 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: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.