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
443-753 4 Waterloo (Washington DC LATA) MD WASHDCRKDS3  8992 ALLEGIANCE TELECOM, INC. - MD 236      
443-753 5 Waterloo (Washington DC LATA) MD WASHDCRKDS3  8992 ALLEGIANCE TELECOM, INC. - MD 236      
443-753 6 Waterloo (Washington DC LATA) MD WASHDCRKDS3  8992 ALLEGIANCE TELECOM, INC. - MD 236      
443-753 8 Waterloo (Washington DC LATA) MD VINNVACB0MD  082H LOCAL ACCESS LLC - MD 236   2016-05-31   
443-753 9 Waterloo (Washington DC LATA) MD WASHDCRKDS3  8992 ALLEGIANCE TELECOM, INC. - MD 236      
443-754 A Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-754 0 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2010-08-06   
443-754 1 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2011-02-03   
443-754 2 Salisbury MD SLBRMDSBRMD  6664 SPRINT SPECTRUM L.P. 242   2011-09-27   
443-754 3 Salisbury MD SLBRMDSC2MD  5562 METRO PCS, INC. 242   2016-12-29   
443-754 4 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2011-07-15   
443-754 5 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2015-09-30   
443-754 6 Salisbury MD ESTNMDES5MD  7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 242   2017-11-21   
443-754 7 Salisbury MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2014-08-01   
443-754 8 Salisbury MD SLBRMDSC2MD  5562 METRO PCS, INC. 242   2016-03-05   
443-754 9 Salisbury MD SLBRMDSC2MD  5562 METRO PCS, INC. 242   2016-03-05   
443-755 A Waterloo MD EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238      
443-755 0 Waterloo MD EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238      
443-755 1 Waterloo MD EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238      
443-755 2 Waterloo MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-755 3 Waterloo MD BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238   2016-05-14   
443-755 4 Waterloo MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
443-755 5 Waterloo MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2015-08-19   
443-755 6 Waterloo MD BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238   2016-05-14   
443-755 7 Waterloo MD BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238   2016-05-14   
443-755 8 Waterloo MD EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238      
443-755 9 Waterloo MD EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238      
443-756 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-757 A Elkridge MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-757 0 Elkridge MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-757 1 Elkridge MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-757 2 Elkridge MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2011-05-01   
443-757 3 Elkridge MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-757 4 Elkridge MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2011-05-01   
443-757 5 Elkridge MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-757 6 Elkridge MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2011-05-01   
443-757 7 Elkridge MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2010-12-27   
443-757 8 Elkridge MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-757 9 Elkridge MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-758 A Annapolis MD BLTMMDCHXEX  7421 AT&T LOCAL 238      
443-758 0 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-01-29   
443-758 1 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-02-07   
443-758 2 Annapolis MD EKRGMD92MMD  6664 SPRINT SPECTRUM L.P. 238   2005-03-13   
443-758 3 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-03   
443-758 4 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-03   
443-758 5 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-03   
443-758 6 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-03   
443-758 7 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-03   
443-758 8 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-03   
443-758 9 Annapolis MD BLTMMDCHXEX  7421 AT&T LOCAL 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 >>

Last updated: Sun, 28 Feb 2021 19:06:05 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.