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: 346 [Rate centres in NPA 346] [Dial plan for NPA 346]

<< 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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-343 A Sugar Land TX SGLDTXXEDS0  2147 WINDSTREAM SUGAR LAND, LLC 560      
346-343 0 Sugar Land TX SGLDTXXEDS0  2147 WINDSTREAM SUGAR LAND, LLC 560   2018-07-15   
346-343 1 Sugar Land TX SGLDTXXEDS0  2147 WINDSTREAM SUGAR LAND, LLC 560   2018-07-15   
346-343 2 Sugar Land TX SGLDTXXEDS0  2147 WINDSTREAM SUGAR LAND, LLC 560   2018-07-15   
346-343 3 Sugar Land TX SGLDTXXEDS0  2147 WINDSTREAM SUGAR LAND, LLC 560   2018-07-15   
346-343 4 Sugar Land TX SGLDTXXEDS0  2147 WINDSTREAM SUGAR LAND, LLC 560   2018-07-15   
346-343 5 Sugar Land TX SGLDTXXEDS0  2147 WINDSTREAM SUGAR LAND, LLC 560   2018-07-15   
346-343 6 Sugar Land TX SGLDTXXEDS0  2147 WINDSTREAM SUGAR LAND, LLC 560   2018-07-15   
346-343 7 Sugar Land TX SGLDTXXEDS0  2147 WINDSTREAM SUGAR LAND, LLC 560   2018-07-15   
346-343 8 Sugar Land TX SGLDTXXEDS0  2147 WINDSTREAM SUGAR LAND, LLC 560   2018-07-15   
346-343 9 Sugar Land TX SGLDTXXEDS0  2147 WINDSTREAM SUGAR LAND, LLC 560   2018-07-15   
346-344 A Crosby TX BYTWTXXAHMD  903C ONVOY, LLC - TX 560      
346-344 0 Crosby TX BYTWTXXAHMD  903C ONVOY, LLC - TX 560   2020-11-16   
346-344 1 Crosby TX HSTNTXJAXLX  177F PEERLESS NETWORK OF TEXAS, LLC - TX 560   2018-11-18   
346-344 2 Crosby TX BYTWTXXAHMD  903C ONVOY, LLC - TX 560   2018-11-01   
346-344 3 Crosby TX BYTWTXXAHMD  903C ONVOY, LLC - TX 560   2018-11-01   
346-344 4 Crosby TX BYTWTXXAHMD  903C ONVOY, LLC - TX 560   2018-09-07   
346-344 5 Crosby TX BYTWTXXAHMD  903C ONVOY, LLC - TX 560   2018-09-07   
346-344 7 Crosby TX BYTWTXXAHMD  903C ONVOY, LLC - TX 560   2020-11-16   
346-344 8 Crosby TX BYTWTXXAHMD  903C ONVOY, LLC - TX 560   2019-07-11   
346-344 9 Crosby TX BYTWTXXAHMD  903C ONVOY, LLC - TX 560   2019-07-11   
346-345 A Humble TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
346-345 0 Humble TX   515J IP HORIZON LLC 560   2018-12-10   
346-345 1 Humble TX   515J IP HORIZON LLC 560   2018-12-10   
346-345 2 Humble TX HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2018-12-12   
346-345 3 Humble TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2019-01-20   
346-345 4 Humble TX HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2019-05-30   
346-345 5 Humble TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2019-06-30   
346-345 6 Humble TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2019-06-30   
346-345 7 Humble TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2018-10-29   
346-345 8 Humble TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2018-08-25   
346-345 9 Humble TX HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2018-08-25   
346-346 A Friendswood TX HSTQTXRG6MD  473F USFON, INC. - TX 560      
346-346 0 Friendswood TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2024-03-09   
346-346 1 Friendswood TX HSTNTXYAHMD  073H TELNYX LLC 560   2024-03-24   
346-346 2 Friendswood TX HSTQTXRG6MD  473F USFON, INC. - TX 560   2023-03-27   
346-346 3 Friendswood TX HSTQTXRG6MD  473F USFON, INC. - TX 560   2023-03-27   
346-346 4 Friendswood TX HSTQTXRG6MD  473F USFON, INC. - TX 560   2023-03-27   
346-346 5 Friendswood TX HSTQTXRG6MD  473F USFON, INC. - TX 560   2023-03-27   
346-346 6 Friendswood TX HSTQTXRG6MD  473F USFON, INC. - TX 560   2023-03-27   
346-346 7 Friendswood TX HSTQTXRG6MD  473F USFON, INC. - TX 560   2023-03-27   
346-346 8 Friendswood TX HSTQTXRG6MD  473F USFON, INC. - TX 560   2023-03-27   
346-346 9 Friendswood TX HSTQTXRG6MD  473F USFON, INC. - TX 560   2023-03-27   
346-347 A Alvin TX HSTNTXYAHMD  073H TELNYX LLC 560      
346-347 0 Alvin TX HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2017-10-07   
346-347 1 Alvin TX HSTNTXYAHMD  073H TELNYX LLC 560   2017-06-07   
346-347 2 Alvin TX HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2017-11-03   
346-347 3 Alvin TX HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2018-07-27   
346-347 4 Alvin TX HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2016-04-26   
346-347 5 Alvin TX HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2016-05-10   

<< 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 >>

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.