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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-764 4 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-09-02   
443-764 5 Glen Burnie MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-11-07   
443-764 6 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-11-16   
443-764 7 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-09-12   
443-764 8 Glen Burnie MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   
443-764 9 Glen Burnie MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2009-07-13   
443-765 A Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-765 0 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-765 1 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-01-19   
443-765 2 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-01-19   
443-765 3 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-01-19   
443-765 4 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-01-19   
443-765 5 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-01-19   
443-765 6 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-01-19   
443-765 7 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-01-19   
443-765 8 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-01-19   
443-765 9 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-04-27   
443-766 A Columbia MD CLMAMDJTDSA  2589 US LEC OF MARYLAND, INC. 238      
443-766 0 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-12-14   
443-766 1 Columbia MD CLMAMDJTDSA  2589 US LEC OF MARYLAND, INC. 238   2005-07-09   
443-766 2 Columbia MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2016-08-03   
443-766 3 Columbia MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2016-08-03   
443-766 4 Columbia MD BLTMMDCHFMD  5562 METRO PCS, INC. 238   2015-10-01   
443-766 5 Columbia MD BLTMMDCHFMD  5562 METRO PCS, INC. 238   2015-09-03   
443-766 6 Columbia MD BLTMMDCHFMD  5562 METRO PCS, INC. 238   2015-11-03   
443-766 7 Columbia MD CLMAMDJTDSA  2589 US LEC OF MARYLAND, INC. 238   2006-07-15   
443-766 8 Columbia MD BLTMMDCHFMD  5562 METRO PCS, INC. 238   2015-10-30   
443-766 9 Columbia MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-01-14   
443-767 A Worthington MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-767 0 Worthington MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-767 1 Worthington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-06-11   
443-767 2 Worthington MD BLTMMD91DS1  2593 CORE COMMUNICATIONS, INC. - MD 238   2004-04-02   
443-767 3 Worthington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-06-11   
443-767 4 Worthington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-08   
443-767 5 Worthington MD BLTMMDCHXMX  506J TWILIO INTERNATIONAL INC 238   2020-12-26   
443-767 6 Worthington MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC. - MD 238   2019-03-29   
443-767 7 Worthington MD PIVLMDPKFMD  9170 BROADVIEW NETWORKS, INC. - MD 238   2008-09-08   
443-767 8 Worthington MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-767 9 Worthington MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-768 A Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238      
443-769 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-769 0 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-08-01   
443-769 1 Baltimore MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238   2008-12-21   
443-769 2 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-08-01   
443-769 3 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-08-01   
443-769 4 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-07-16   
443-769 5 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-07-16   
443-769 6 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-07-16   
443-769 7 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-07-16   
443-769 8 Baltimore MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-07-16   

<< 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 >>

Last updated: Sun, 28 Feb 2021 19:06:05 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.