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
443-590 A Reisterstown MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-590 0 Reisterstown MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-590 1 Reisterstown MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-590 3 Reisterstown MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-01-02   
443-590 4 Reisterstown MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-590 5 Reisterstown MD BLTOMDKHDS0  7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2008-10-01   
443-590 6 Reisterstown MD BLTMMDCHFMD  5562 METRO PCS, INC. 238   2016-12-14   
443-590 7 Reisterstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-21   
443-590 8 Reisterstown MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-590 9 Reisterstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-21   
443-591 A Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-591 0 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-07-06   
443-591 1 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-09-03   
443-591 2 Glen Burnie MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-01-13   
443-591 3 Glen Burnie MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2010-01-13   
443-591 4 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-02-16   
443-591 5 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-03-16   
443-591 6 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-03   
443-591 7 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-14   
443-591 8 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-14   
443-591 9 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-06-14   
443-592 A Elkridge MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC. - MD 238      
443-592 3 Elkridge MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2017-04-18   
443-592 5 Elkridge MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-06-16   
443-592 6 Elkridge MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-06-16   
443-592 7 Elkridge MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2018-06-16   
443-592 8 Elkridge MD   082H LOCAL ACCESS LLC - MD 238   2019-04-26   
443-592 9 Elkridge MD   145J TERRA NOVA TELECOM INC. 238   2021-01-27   
443-593 A Elkton MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-593 0 Elkton MD BLTQMD010MD  082H LOCAL ACCESS LLC - MD 238   2016-01-04   
443-593 1 Elkton MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-593 2 Elkton MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2016-03-01   
443-593 3 Elkton MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2014-09-21   
443-593 4 Elkton MD BLTMMDCH06T  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-23   
443-593 5 Elkton MD BLTMMDCH06T  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-23   
443-593 6 Elkton MD BLTQMD010MD  082H LOCAL ACCESS LLC - MD 238   2015-03-23   
443-593 7 Elkton MD   508J CENTURYLINK COMMUNICATIONS LLC 238   2014-06-12   
443-593 8 Elkton MD BLTMMDCHXOY  6626 OMNIPOINT COMMUNICATIONS ENTERPRISES, L.P. 238   2014-02-09   
443-593 9 Elkton MD BLTMMDCHXOY  6626 OMNIPOINT COMMUNICATIONS ENTERPRISES, L.P. 238   2014-02-09   
443-594 A Sparrows Point MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-594 0 Sparrows Point MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-594 1 Sparrows Point MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-594 2 Sparrows Point MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-02-10   
443-594 3 Sparrows Point MD BLTOMDKHDS0  7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2008-10-01   
443-594 4 Sparrows Point MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 238      
443-594 5 Sparrows Point MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-594 6 Sparrows Point MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-08   
443-594 7 Sparrows Point MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-24   
443-594 8 Sparrows Point MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-24   
443-594 9 Sparrows Point MD BLTMMDCHLMD  082H LOCAL ACCESS LLC - MD 238   2016-10-14   

<< 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: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.