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
443-907 3 Elkton MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-07-02   
443-907 4 Elkton MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-05-03   
443-907 5 Elkton MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-08-02   
443-907 6 Elkton MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2005-08-01   
443-907 7 Elkton MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-907 8 Elkton MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-907 9 Elkton MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-908 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-908 0 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-08-27   
443-908 1 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-08-30   
443-908 2 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-08-30   
443-908 3 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-08-30   
443-908 4 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-08-30   
443-908 5 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-08-30   
443-908 6 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-08-30   
443-908 7 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-08-30   
443-908 8 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-08-30   
443-908 9 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-08-30   
443-909 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-909 0 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-10-06   
443-909 1 Baltimore MD   876D ONVOY, LLC - MD 238   2024-07-12   
443-909 2 Baltimore MD   876D ONVOY, LLC - MD 238   2024-07-12   
443-909 3 Baltimore MD   876D ONVOY, LLC - MD 238   2024-07-12   
443-909 4 Baltimore MD   876D ONVOY, LLC - MD 238   2024-07-12   
443-909 5 Baltimore MD   876D ONVOY, LLC - MD 238   2024-07-12   
443-909 6 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-05-02   
443-909 7 Baltimore MD   829J PAETEC ITEL, LLC 238   2006-11-15   
443-909 8 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-05-02   
443-909 9 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-05-02   
443-910 A Bel Air MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-910 0 Bel Air MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-910 1 Bel Air MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-910 2 Bel Air MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-910 3 Bel Air MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-910 4 Bel Air MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-910 5 Bel Air MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-910 6 Bel Air MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-910 7 Bel Air MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-910 8 Bel Air MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-910 9 Bel Air MD   515J IP HORIZON LLC 238   2013-09-06   
443-912 A Towson MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-912 0 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-05-01   
443-912 1 Towson MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2002-08-23   
443-912 2 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-03-05   
443-912 3 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-03-05   
443-912 4 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-03-05   
443-912 5 Towson MD   876D ONVOY, LLC - MD 238   2015-07-29   
443-912 6 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2008-03-11   
443-912 7 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-03-07   
443-912 8 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-03-07   

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

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.