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
443-644 2 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-10-22   
443-644 3 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-06-16   
443-644 4 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-06-16   
443-644 5 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-06-16   
443-644 6 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-10-22   
443-644 7 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-10-22   
443-644 8 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-10-22   
443-644 9 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-10-22   
443-645 A Millersville MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-645 1 Millersville MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-645 2 Millersville MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC. - MD 238   2019-03-29   
443-645 3 Millersville MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2015-04-17   
443-645 4 Millersville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-24   
443-645 5 Millersville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-24   
443-645 6 Millersville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-10-20   
443-645 7 Millersville MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-645 8 Millersville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-05-31   
443-645 9 Millersville MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
443-646 A North Beach MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-646 0 North Beach MD BLTMMDCHXMX  506J TWILIO INTERNATIONAL INC 238   2020-12-26   
443-646 1 North Beach MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-646 2 North Beach MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2016-12-02   
443-646 3 North Beach MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-06-04   
443-646 4 North Beach MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-23   
443-646 5 North Beach MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2014-05-01   
443-646 6 North Beach MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2015-08-05   
443-646 7 North Beach MD   508J CENTURYLINK COMMUNICATIONS LLC 238   2014-06-12   
443-646 8 North Beach MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-23   
443-646 9 North Beach MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
443-647 A New Windsor MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-647 0 New Windsor MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-06-16   
443-647 1 New Windsor MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-647 2 New Windsor MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC. - MD 238   2019-03-29   
443-647 3 New Windsor MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-08   
443-647 4 New Windsor MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-08   
443-647 5 New Windsor MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
443-647 6 New Windsor MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-06-16   
443-647 7 New Windsor MD   508J CENTURYLINK COMMUNICATIONS LLC 238   2014-06-12   
443-647 8 New Windsor MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-17   
443-647 9 New Windsor MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-17   
443-648 A Essex MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-648 0 Essex MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-12-09   
443-648 1 Essex MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-08-23   
443-648 2 Essex MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238   2007-06-15   
443-648 3 Essex MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-02   
443-648 4 Essex MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-648 5 Essex MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-02-13   
443-648 6 Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-04-12   
443-648 7 Essex MD   508J CENTURYLINK COMMUNICATIONS LLC 238   2014-06-25   
443-648 8 Essex MD BLTQMD010MD  082H LOCAL ACCESS LLC - MD 238   2013-09-06   

<< 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: VoIP Much Phone Company

Like this site? We accept donations via PayPal.