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
443-209 0 Havre de Grace MD   7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-209 1 Havre de Grace MD   7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-209 3 Havre de Grace MD   7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-209 4 Havre de Grace MD   7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-209 5 Havre de Grace MD   5966 LIGHTWAVE COMMUNICATIONS, LLC - MD 238   2005-10-07   
443-209 7 Havre de Grace MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2009-03-02   
443-209 8 Havre de Grace MD   7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-209 9 Havre de Grace MD   7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-210 A Salisbury MD SLBRMDSBRMD  6664 SPRINT SPECTRUM L.P. 242   2011-11-14   
443-210 0 Salisbury MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2015-06-21   
443-210 1 Salisbury MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2015-06-21   
443-210 2 Salisbury MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 242   2013-03-07   
443-210 3 Salisbury MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 242   2011-11-18   
443-210 4 Salisbury MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2014-10-23   
443-210 5 Salisbury MD   5562 METRO PCS, INC. 242   2016-10-01   
443-210 6 Salisbury MD   5562 METRO PCS, INC. 242   2016-11-23   
443-210 7 Salisbury MD   6664 SPRINT SPECTRUM L.P. 242   2011-11-14   
443-210 8 Salisbury MD   6664 SPRINT SPECTRUM L.P. 242   2011-11-14   
443-210 9 Salisbury MD   6664 SPRINT SPECTRUM L.P. 242   2011-11-14   
443-212 A Sparks-Glencoe MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-212 1 Sparks-Glencoe MD   2589 US LEC OF MARYLAND, INC. 238   2003-03-29   
443-212 4 Sparks-Glencoe MD   4716 PAETEC COMMUNICATIONS, INC. - MD 238   2004-09-28   
443-212 5 Sparks-Glencoe MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2005-03-10   
443-212 6 Sparks-Glencoe MD   8864 BROADWING COMMUNICATIONS. LLC - MD 238   2006-06-03   
443-212 7 Sparks-Glencoe MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2008-07-01   
443-212 8 Sparks-Glencoe MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   
443-213 A Pikesville MD OWMLMDOMDS0  9212 VERIZON MARYLAND, INC. 238      
443-213 0 Pikesville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-09-07   
443-213 1 Pikesville MD   4773 XO MARYLAND, LLC 238   2006-09-11   
443-213 2 Pikesville MD   9212 VERIZON MARYLAND, INC. 238   2003-09-26   
443-213 3 Pikesville MD   9212 VERIZON MARYLAND, INC. 238   2003-09-26   
443-213 4 Pikesville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2019-04-22   
443-213 5 Pikesville MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2014-07-13   
443-213 6 Pikesville MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2003-09-26   
443-213 7 Pikesville MD   2589 US LEC OF MARYLAND, INC. 238   2016-12-07   
443-213 8 Pikesville MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2011-06-28   
443-213 9 Pikesville MD   2593 CORE COMMUNICATIONS, INC. - MD 238   2019-04-22   
443-214 A Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-214 0 Annapolis MD   876D ONVOY, LLC - MD 238   2016-02-22   
443-214 1 Annapolis MD   082H LOCAL ACCESS LLC - MD 238   2013-09-06   
443-214 2 Annapolis MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-03-16   
443-214 3 Annapolis MD   876D ONVOY, LLC - MD 238   2013-08-10   
443-214 4 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2013-07-16   
443-214 5 Annapolis MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2013-09-30   
443-214 6 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2013-10-11   
443-214 7 Annapolis MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2011-12-17   
443-214 8 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-23   
443-214 9 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-23   
443-215 A Chestertown MD ESTNMDBNGT0  2593 CORE COMMUNICATIONS, INC. - MD 242      
443-216 A Dundalk MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 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: Wed, 05 Feb 2020 02:15:44 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.