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.

Houston, TX

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
281-216 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-217 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-220 A HSTNTXCLX5Y  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 560      
281-220 0 HSTNTXCLX5Y  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 560      
281-220 1 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2002-09-21   
281-220 2 HSTNTXCLX5Y  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 560      
281-220 3 HSTNTXCLX5Y  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 560      
281-220 4 HSTNTXCLX5Y  7670 GRANDE COMMUNICATIONS NETWORKS, INC. - TX 560      
281-220 5 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2002-07-09   
281-220 6 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-06-15   
281-220 7 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2005-04-03   
281-220 8 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2002-05-06   
281-220 9 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2003-04-28   
281-221 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-222 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-224 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-225 A HSTOTXORDS1  2091 ETS TELEPHONE COMPANY, INC. 560      
281-228 A HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
281-236 A HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560      
281-250 A HSTDTXBG5MD  6701 AERIAL COMMUNICATIONS, INC. 560      
281-254 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-254 0 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2011-08-22   
281-254 1 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2011-08-22   
281-254 2 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2011-08-22   
281-254 3 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2011-08-22   
281-254 4 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2011-08-22   
281-254 5 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2011-08-22   
281-254 6 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2011-08-19   
281-254 7 HSTNTXGIDS0  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2012-05-13   
281-254 8 HSTNTXGIDS0  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2012-05-13   
281-254 9 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2011-08-19   
281-266 A HSTXTX152MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-267 A HSTXTX152MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-268 A HSTXTX152MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-300 A   5562 METROPCS, INC. 560      
281-300 0 HSTDTXBG5MD  5562 METROPCS, INC. 560      
281-300 1 HSTDTXBG5MD  5562 METROPCS, INC. 560      
281-300 2 HSTDTXBG5MD  5562 METROPCS, INC. 560      
281-300 3 HSTDTXBG5MD  5562 METROPCS, INC. 560      
281-300 4 HSTDTXBG5MD  5562 METROPCS, INC. 560      
281-300 5 HSTDTXBG5MD  5562 METROPCS, INC. 560      
281-300 6 HSTDTXBG5MD  5562 METROPCS, INC. 560      
281-300 7 HSTDTXBG5MD  5562 METROPCS, INC. 560      
281-300 8 HSTDTXBG5MD  5562 METROPCS, INC. 560      
281-300 9   6701 AERIAL COMMUNICATIONS, INC. 560      
281-352 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-365 A HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
281-365 0 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2017-06-22   
281-365 1 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2017-06-22   
281-365 2 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2017-06-22   

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.