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 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
346-330 0   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2017-01-02   
346-330 1   004F BANDWIDTH.COM CLEC, LLC - TX 560   2017-08-29   
346-330 2   004F BANDWIDTH.COM CLEC, LLC - TX 560   2017-08-29   
346-330 3   004F BANDWIDTH.COM CLEC, LLC - TX 560   2017-08-29   
346-330 4   004F BANDWIDTH.COM CLEC, LLC - TX 560   2017-08-29   
346-330 5   903C ONVOY, LLC - TX 560   2017-01-05   
346-330 6   903C ONVOY, LLC - TX 560   2017-01-05   
346-330 7   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2017-03-20   
346-330 8   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2017-06-12   
346-330 9   318J COMCAST IP PHONE, LLC 560   2017-05-22   
346-335 A HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560      
346-335 0   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-07-07   
346-335 1   318J COMCAST IP PHONE, LLC 560   2018-06-01   
346-335 2   318J COMCAST IP PHONE, LLC 560   2018-06-01   
346-335 3   318J COMCAST IP PHONE, LLC 560   2018-06-01   
346-335 4   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-06-02   
346-335 5   177F PEERLESS NETWORK OF TEXAS, LLC - TX 560   2021-11-01   
346-335 6   177F PEERLESS NETWORK OF TEXAS, LLC - TX 560   2021-11-01   
346-335 7   318J COMCAST IP PHONE, LLC 560   2018-06-07   
346-335 8   318J COMCAST IP PHONE, LLC 560   2018-06-07   
346-335 9   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-10-13   
346-339 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
346-339 0   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2018-06-29   
346-339 1   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2018-06-29   
346-339 2   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2018-06-29   
346-339 3   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2018-06-29   
346-339 4   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2018-06-29   
346-339 5   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2018-06-29   
346-339 6   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2018-06-29   
346-339 7   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2018-06-29   
346-339 8   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2018-06-29   
346-339 9   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2019-05-06   
346-348 A HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560      
346-348 0   004F BANDWIDTH.COM CLEC, LLC - TX 560   2018-08-31   
346-348 1   004F BANDWIDTH.COM CLEC, LLC - TX 560   2018-08-31   
346-348 2   004F BANDWIDTH.COM CLEC, LLC - TX 560   2018-08-31   
346-348 3   7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2018-09-01   
346-348 4   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2019-05-06   
346-348 5   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2019-05-06   
346-348 6   7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2018-09-01   
346-348 7   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2018-10-22   
346-348 8   6701 AERIAL COMMUNICATIONS, INC. 560   2019-06-24   
346-348 9   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560   2018-10-22   
346-352 A HSTNTX01X7X  516C AT&T CORP. 560      
346-352 0   516C AT&T CORP. 560   2016-06-13   
346-352 1   004F BANDWIDTH.COM CLEC, LLC - TX 560   2016-08-15   
346-352 2   004F BANDWIDTH.COM CLEC, LLC - TX 560   2016-08-15   
346-352 3   318J COMCAST IP PHONE, LLC 560   2016-05-23   
346-352 4   318J COMCAST IP PHONE, LLC 560   2016-05-23   
346-352 5   7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2016-05-23   
346-352 6   7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2016-07-25   
346-352 7   004F BANDWIDTH.COM CLEC, LLC - TX 560   2016-08-15   
346-352 8   004F BANDWIDTH.COM CLEC, LLC - TX 560   2016-08-15   
346-352 9   004F BANDWIDTH.COM CLEC, LLC - TX 560   2016-08-16   
346-353 A HSTNTXYAMMD  996H AIRESPRING, INC. 560      
346-353 0   996H AIRESPRING, INC. 560   2018-09-07   
346-353 1   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2020-03-19   
346-353 2   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2019-04-13   
346-353 3   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2020-03-19   
346-353 4   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2020-05-07   
346-353 5   903C ONVOY, LLC - TX 560   2019-04-19   
346-353 6   903C ONVOY, LLC - TX 560   2019-04-19   
346-353 7   903C ONVOY, LLC - TX 560   2019-04-19   
346-353 8   903C ONVOY, LLC - TX 560   2019-04-19   
346-353 9   903C ONVOY, LLC - TX 560   2019-04-19   
346-354 A HSTNTXJAXLX  177F PEERLESS NETWORK OF TEXAS, LLC - TX 560      
346-354 0   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2023-07-03   
346-354 1   177F PEERLESS NETWORK OF TEXAS, LLC - TX 560   2018-09-30   
346-354 2   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-12-01   
346-354 3   6701 AERIAL COMMUNICATIONS, INC. 560   2019-06-08   
346-354 4   515J IP HORIZON LLC 560   2018-12-09   
346-354 5   515J IP HORIZON LLC 560   2018-12-09   
346-354 6   318J COMCAST IP PHONE, LLC 560   2020-02-04   
346-354 7   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2020-05-07   
346-354 8   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2020-05-07   
346-354 9   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2020-05-07   
346-355 A HSTNTXYALMD  597F VOIP INNOVATIONS, LLC 560      
346-355 0   597F VOIP INNOVATIONS, LLC 560   2018-09-28   
346-355 1   903C ONVOY, LLC - TX 560   2019-03-21   
346-355 2   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2020-05-07   
346-355 3   903C ONVOY, LLC - TX 560   2020-01-16   
346-355 4   903C ONVOY, LLC - TX 560   2020-01-16   
346-355 5   903C ONVOY, LLC - TX 560   2020-01-16   
346-355 6   903C ONVOY, LLC - TX 560   2020-01-16   
346-355 7   903C ONVOY, LLC - TX 560   2020-01-16   
346-355 8   903C ONVOY, LLC - TX 560   2019-03-21   
346-355 9   903C ONVOY, LLC - TX 560   2019-03-21   
346-356 A HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
346-356 0   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-09-13   
346-356 1   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-09-13   
346-356 2   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-09-13   
346-356 3   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-09-13   
346-356 4   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-09-13   
346-356 5   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-09-13   
346-356 6   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-09-13   
346-356 7   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-09-13   
346-356 8   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-09-13   
346-356 9   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2018-09-13   
346-383 A HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
346-383 0   6701 AERIAL COMMUNICATIONS, INC. 560   2019-06-15   

<< 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 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.