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
443-488 3 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-08-14   
443-488 4 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-08-14   
443-488 5 Baltimore MD   4773 XO MARYLAND, LLC 238   2010-10-20   
443-488 6 Baltimore MD   4773 XO MARYLAND, LLC 238   2010-10-20   
443-488 7 Baltimore MD   4773 XO MARYLAND, LLC 238   2010-10-20   
443-488 8 Baltimore MD   4773 XO MARYLAND, LLC 238   2010-10-20   
443-488 9 Baltimore MD   4773 XO MARYLAND, LLC 238   2010-10-20   
443-489 A Chase MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-489 0 Chase MD   4773 XO MARYLAND, LLC 238   2001-11-19   
443-489 1 Chase MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-489 2 Chase MD   876D ONVOY, LLC - MD 238   2016-03-24   
443-489 3 Chase MD   2697 CTC COMMUNICATIONS CORP. - MD 238   2007-01-24   
443-489 4 Chase MD   876D ONVOY, LLC - MD 238   2016-03-24   
443-489 5 Chase MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2008-10-01   
443-489 6 Chase MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-02-13   
443-489 7 Chase MD   7575 CENTURYLINK COMMUNICATIONS LLC 238   2014-06-25   
443-489 8 Chase MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-489 9 Chase MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-490 A Edgewood MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-490 0 Edgewood MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-490 1 Edgewood MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-490 2 Edgewood MD   5562 METRO PCS, INC. 238   2016-07-28   
443-490 3 Edgewood MD   5562 METRO PCS, INC. 238   2016-08-04   
443-490 4 Edgewood MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-490 5 Edgewood MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-490 6 Edgewood MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-10-19   
443-490 7 Edgewood MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-10-19   
443-490 8 Edgewood MD   964H BARR TELL USA, INC. 238   2016-12-17   
443-490 9 Edgewood MD   5562 METRO PCS, INC. 238   2017-10-14   
443-491 A Parkton MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-491 0 Parkton MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-491 1 Parkton MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-491 2 Parkton MD   5966 LIGHTWAVE COMMUNICATIONS, LLC - MD 238   2005-10-07   
443-491 3 Parkton MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2005-03-10   
443-491 4 Parkton MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-491 5 Parkton MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-491 8 Parkton MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-11-18   
443-491 9 Parkton MD   876D ONVOY, LLC - MD 238   2012-10-07   
443-492 A Elkridge MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-492 0 Elkridge MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-492 1 Elkridge MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-492 2 Elkridge MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-12   
443-492 3 Elkridge MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-12   
443-492 4 Elkridge MD   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-492 5 Elkridge MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-492 6 Elkridge MD   2697 CTC COMMUNICATIONS CORP. - MD 238   2008-08-01   
443-492 7 Elkridge MD   6664 SPRINT SPECTRUM L.P. 238   2011-11-07   
443-492 8 Elkridge MD   6664 SPRINT SPECTRUM L.P. 238   2011-03-15   
443-492 9 Elkridge MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-493 A Delmar MD SLBRMDAZCM2  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2009-05-07   

<< 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 >>

Last updated: Wed, 01 Apr 2020 02:09:16 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.