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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-493 5 Delmar MD   2593 CORE COMMUNICATIONS, INC. - MD 242   2018-06-17   
443-493 6 Delmar MD   2593 CORE COMMUNICATIONS, INC. - MD 242   2018-06-17   
443-493 7 Delmar MD   876D ONVOY, LLC - MD 242   2017-04-13   
443-493 9 Delmar MD   073H TELNYX LLC 242   2017-09-13   
443-494 A Millersville MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-494 0 Millersville MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-494 1 Millersville MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-494 2 Millersville MD   876D ONVOY, LLC - MD 238   2012-10-07   
443-494 3 Millersville MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2008-10-01   
443-494 4 Millersville MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-494 5 Millersville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-494 6 Millersville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-07-06   
443-494 7 Millersville MD   7575 CENTURYLINK COMMUNICATIONS LLC 238   2014-06-12   
443-494 8 Millersville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   
443-494 9 Millersville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-495 A Parkville MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-495 0 Parkville MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-495 1 Parkville MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-495 2 Parkville MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2016-05-18   
443-495 3 Parkville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-07-31   
443-495 4 Parkville MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-495 5 Parkville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-495 6 Parkville MD   876D ONVOY, LLC - MD 238   2018-05-27   
443-495 7 Parkville MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2015-09-25   
443-495 8 Parkville MD   964H BARR TELL USA, INC. 238   2016-12-17   
443-495 9 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-08-14   
443-496 A Easton MD   6664 SPRINT SPECTRUM L.P. 242      
443-496 0 Easton MD   6664 SPRINT SPECTRUM L.P. 242      
443-496 1 Easton MD   6664 SPRINT SPECTRUM L.P. 242      
443-496 2 Easton MD   6664 SPRINT SPECTRUM L.P. 242      
443-496 3 Easton MD   876D ONVOY, LLC - MD 242   2018-07-19   
443-496 4 Easton MD   6664 SPRINT SPECTRUM L.P. 242      
443-496 5 Easton MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2014-06-30   
443-496 6 Easton MD   6664 SPRINT SPECTRUM L.P. 242      
443-496 7 Easton MD   2593 CORE COMMUNICATIONS, INC. - MD 242   2019-04-12   
443-496 8 Easton MD   2593 CORE COMMUNICATIONS, INC. - MD 242   2019-04-12   
443-496 9 Easton MD   2593 CORE COMMUNICATIONS, INC. - MD 242   2019-04-12   
443-497 A Salisbury MD   6664 SPRINT SPECTRUM L.P. 242      
443-497 0 Salisbury MD   6664 SPRINT SPECTRUM L.P. 242      
443-497 1 Salisbury MD   6664 SPRINT SPECTRUM L.P. 242      
443-497 2 Salisbury MD   6664 SPRINT SPECTRUM L.P. 242      
443-497 3 Salisbury MD   6664 SPRINT SPECTRUM L.P. 242      
443-497 4 Salisbury MD   6664 SPRINT SPECTRUM L.P. 242      
443-497 5 Salisbury MD   6664 SPRINT SPECTRUM L.P. 242   2007-10-19   
443-497 6 Salisbury MD   6664 SPRINT SPECTRUM L.P. 242      
443-497 7 Salisbury MD   2593 CORE COMMUNICATIONS, INC. - MD 242   2019-05-02   
443-497 8 Salisbury MD   6664 SPRINT SPECTRUM L.P. 242   2007-03-13   
443-497 9 Salisbury MD   6664 SPRINT SPECTRUM L.P. 242   2007-03-13   
443-498 A Catonsville MD   4773 XO MARYLAND, LLC 238      
443-498 0 Catonsville MD   4773 XO MARYLAND, 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 >>

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.