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
443-649 1 Sparrows Point MD   829J PAETEC ITEL, LLC 238      
443-649 2 Sparrows Point MD   829J PAETEC ITEL, LLC 238      
443-649 3 Sparrows Point MD   829J PAETEC ITEL, LLC 238      
443-649 4 Sparrows Point MD   5562 METROPCS, INC. 238   2016-11-25   
443-649 5 Sparrows Point MD   318J COMCAST IP PHONE, LLC 238   2014-11-06   
443-649 6 Sparrows Point MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-31   
443-649 7 Sparrows Point MD   5562 METROPCS, INC. 238   2018-04-16   
443-649 8 Sparrows Point MD   515J IP HORIZON LLC 238   2016-01-04   
443-649 9 Sparrows Point MD   829J PAETEC ITEL, LLC 238      
443-650 A Reisterstown MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-650 0 Reisterstown MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-650 1 Reisterstown MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-650 2 Reisterstown MD   515J IP HORIZON LLC 238   2016-10-14   
443-650 3 Reisterstown MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-09-08   
443-650 4 Reisterstown MD   5562 METROPCS, INC. 238   2020-09-06   
443-650 5 Reisterstown MD   829J PAETEC ITEL, LLC 238   2003-03-04   
443-650 6 Reisterstown MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-650 7 Reisterstown MD   073H TELNYX LLC 238   2017-04-25   
443-650 8 Reisterstown MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-650 9 Reisterstown MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-651 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-651 0 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-09-05   
443-651 1 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-09-07   
443-651 2 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-09-07   
443-651 3 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-09-07   
443-651 4 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-09-07   
443-651 5 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-09-07   
443-651 6 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-09-07   
443-651 7 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-09-07   
443-651 8 Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-09-07   
443-651 9 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-05-20   
443-652 A Towson MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-652 0 Towson MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2016-07-14   
443-652 1 Towson MD   876D ONVOY, LLC - MD 238   2024-11-04   
443-652 2 Towson MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-06-16   
443-652 3 Towson MD   318J COMCAST IP PHONE, LLC 238   2016-05-19   
443-652 4 Towson MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-07-21   
443-652 5 Towson MD   829J PAETEC ITEL, LLC 238   2016-07-01   
443-652 6 Towson MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2016-07-22   
443-652 7 Towson MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2018-09-20   
443-652 8 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-10-14   
443-652 9 Towson MD   515J IP HORIZON LLC 238   2016-10-14   
443-653 A Parkville MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-653 0 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-653 1 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-653 2 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-653 3 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-09-21   
443-653 4 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2013-12-27   
443-653 5 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-04-21   
443-653 6 Parkville MD   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: VoIP.ms

Like this site? We accept donations via PayPal.