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
443-814 5 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-08-16   
443-814 6 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-08-16   
443-814 7 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-814 8 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-814 9 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-12-23   
443-815 A Essex MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-815 0 Essex MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-815 1 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-11-08   
443-815 2 Essex MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-815 3 Essex MD   318J COMCAST IP PHONE, LLC 238   2013-10-03   
443-815 4 Essex MD   876D ONVOY, LLC - MD 238   2014-11-01   
443-815 5 Essex MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-815 6 Essex MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-815 7 Essex MD   876D ONVOY, LLC - MD 238   2014-11-01   
443-815 8 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-10-10   
443-815 9 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-11-08   
443-816 A Severna Park MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-816 0 Severna Park MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-816 1 Severna Park MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-816 2 Severna Park MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-816 3 Severna Park MD   5562 METROPCS, INC. 238   2010-12-27   
443-816 4 Severna Park MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-22   
443-816 5 Severna Park MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-22   
443-816 6 Severna Park MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-22   
443-816 7 Severna Park MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-22   
443-816 8 Severna Park MD   5562 METROPCS, INC. 238   2010-12-27   
443-816 9 Severna Park MD   876D ONVOY, LLC - MD 238   2025-04-06   
443-817 A Armiger-Gibson Island MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-817 0 Armiger-Gibson Island MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-817 1 Armiger-Gibson Island MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-817 2 Armiger-Gibson Island MD   318J COMCAST IP PHONE, LLC 238   2006-11-30   
443-817 3 Armiger-Gibson Island MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2015-01-12   
443-817 4 Armiger-Gibson Island MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-817 5 Armiger-Gibson Island MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-817 6 Armiger-Gibson Island MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-817 7 Armiger-Gibson Island MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2022-09-30   
443-817 8 Armiger-Gibson Island MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2015-01-12   
443-817 9 Armiger-Gibson Island MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-818 A Armiger-Gibson Island MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-818 0 Armiger-Gibson Island MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-10-01   
443-818 1 Armiger-Gibson Island MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-07-01   
443-818 2 Armiger-Gibson Island MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-07-01   
443-818 3 Armiger-Gibson Island MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-08-22   
443-818 4 Armiger-Gibson Island MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-08-22   
443-818 5 Armiger-Gibson Island MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-02-20   
443-818 6 Armiger-Gibson Island MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-02-20   
443-818 7 Armiger-Gibson Island MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-10-01   
443-818 8 Armiger-Gibson Island MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2013-11-22   
443-818 9 Armiger-Gibson Island MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-02-13   
443-819 A Bel Air MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 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: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.