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.

Harlingen, TX

<< 1 2 3 4 5 6 7 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
956-367 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2014-11-07   
956-368 A HRLNTXHGX1X  903C ONVOY, LLC - TX 568      
956-368 0   004F BANDWIDTH.COM CLEC, LLC - TX 568   2021-11-25   
956-368 1   903C ONVOY, LLC - TX 568   2020-01-27   
956-368 2   903C ONVOY, LLC - TX 568   2020-01-27   
956-368 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2015-07-24   
956-368 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 568   2015-08-26   
956-368 5   793K TWC IP ENABLED SERVICES, LLC 568   2017-11-01   
956-368 6   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 568   2017-03-06   
956-368 7   903C ONVOY, LLC - TX 568   2020-01-27   
956-368 8   903C ONVOY, LLC - TX 568   2019-04-08   
956-368 9   903C ONVOY, LLC - TX 568   2019-04-08   
956-389 A HRLNTXHGDS0  9533 SOUTHWESTERN BELL 568      
956-389 0   515J IP HORIZON LLC 568   2022-03-31   
956-389 1   9533 SOUTHWESTERN BELL 568      
956-389 2   9533 SOUTHWESTERN BELL 568      
956-389 3   9533 SOUTHWESTERN BELL 568      
956-389 4   9533 SOUTHWESTERN BELL 568      
956-389 5   9533 SOUTHWESTERN BELL 568      
956-389 6   9533 SOUTHWESTERN BELL 568      
956-389 7   9533 SOUTHWESTERN BELL 568      
956-389 8   9533 SOUTHWESTERN BELL 568      
956-389 9   004F BANDWIDTH.COM CLEC, LLC - TX 568   2022-10-16   
956-390 A HRLNTXHG03T  9533 SOUTHWESTERN BELL 568      
956-392 A HRLNTXHGDS0  9533 SOUTHWESTERN BELL 568      
956-392 0   939H COMMIO, LLC 568   2024-01-20   
956-392 1   5562 METROPCS, INC. 568   2020-06-10   
956-392 2   5562 METROPCS, INC. 568   2019-02-25   
956-392 3   5562 METROPCS, INC. 568   2015-12-18   
956-392 4   5562 METROPCS, INC. 568   2020-06-10   
956-392 5   9533 SOUTHWESTERN BELL 568      
956-392 6   9533 SOUTHWESTERN BELL 568      
956-392 7   9533 SOUTHWESTERN BELL 568      
956-392 8   903C ONVOY, LLC - TX 568   2023-07-09   
956-392 9   5562 METROPCS, INC. 568   2017-01-06   
956-406 A HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568   2024-12-30   
956-406 0   004F BANDWIDTH.COM CLEC, LLC - TX 568   2021-11-25   
956-406 2   004F BANDWIDTH.COM CLEC, LLC - TX 568   2022-10-23   
956-406 3   004F BANDWIDTH.COM CLEC, LLC - TX 568   2021-08-23   
956-406 4   5562 METROPCS, INC. 568   2015-12-23   
956-406 5   004F BANDWIDTH.COM CLEC, LLC - TX 568   2021-08-23   
956-406 6   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 568   2018-01-02   
956-406 7   004F BANDWIDTH.COM CLEC, LLC - TX 568   2021-08-23   
956-406 8   073H TELNYX LLC 568   2022-06-19   
956-406 9   004F BANDWIDTH.COM CLEC, LLC - TX 568   2022-10-23   
956-412 A HRLNTXHGDS0  9533 SOUTHWESTERN BELL 568      
956-421 A HRLNTXHGDS0  9533 SOUTHWESTERN BELL 568      
956-423 A HRLNTXHGDS0  9533 SOUTHWESTERN BELL 568      
956-425 A HRLNTXHGDS0  9533 SOUTHWESTERN BELL 568      
956-427 A HRLNTXHGDS0  9533 SOUTHWESTERN BELL 568      
956-428 A HRLNTXHGDS0  9533 SOUTHWESTERN BELL 568      
956-430 A HRLNTXHGDS0  9533 SOUTHWESTERN BELL 568      
956-440 A HRLNTXHGDS0  9533 SOUTHWESTERN BELL 568      
956-440 0   9533 SOUTHWESTERN BELL 568      
956-440 1   9533 SOUTHWESTERN BELL 568      
956-440 2   9533 SOUTHWESTERN BELL 568      
956-440 3   9533 SOUTHWESTERN BELL 568      
956-440 4   9533 SOUTHWESTERN BELL 568      
956-440 5   5562 METROPCS, INC. 568   2019-02-25   
956-440 6   9533 SOUTHWESTERN BELL 568      
956-440 7   9533 SOUTHWESTERN BELL 568      
956-440 8   9533 SOUTHWESTERN BELL 568      
956-440 9   9533 SOUTHWESTERN BELL 568      
956-444 A HRLNTXHGDS0  9533 SOUTHWESTERN BELL 568      
956-444 0   9533 SOUTHWESTERN BELL 568      
956-444 1   9533 SOUTHWESTERN BELL 568      
956-444 2   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 568   2006-07-07   
956-444 3   9533 SOUTHWESTERN BELL 568      
956-444 4   965H FRACTEL, LLC 568   2020-07-12   
956-444 5   9533 SOUTHWESTERN BELL 568      
956-444 6   624H ONVOY SPECTRUM, LLC 568   2021-11-19   
956-444 7   9533 SOUTHWESTERN BELL 568      
956-444 8   624H ONVOY SPECTRUM, LLC 568   2021-11-19   
956-444 9   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 568   2022-12-08   
956-453 A HRLNTXKX8MD  5562 METROPCS, INC. 568      
956-453 0   515J IP HORIZON LLC 568   2025-05-04   
956-453 1   515J IP HORIZON LLC 568   2025-05-04   
956-453 3   5562 METROPCS, INC. 568      
956-453 4   5562 METROPCS, INC. 568      
956-453 5   5562 METROPCS, INC. 568      
956-453 6   5562 METROPCS, INC. 568      
956-453 7   5562 METROPCS, INC. 568      
956-453 8   5562 METROPCS, INC. 568      
956-453 9   4290 STPCS JOINT VENTURE, LLC 568      
956-454 A HRLNTXKX8MD  5562 METROPCS, INC. 568      
956-454 0   5562 METROPCS, INC. 568      
956-454 1   5562 METROPCS, INC. 568      
956-454 2   5562 METROPCS, INC. 568      
956-454 3   5562 METROPCS, INC. 568      
956-454 4   5562 METROPCS, INC. 568      
956-454 5   5562 METROPCS, INC. 568      
956-454 6   5562 METROPCS, INC. 568      
956-454 7   5562 METROPCS, INC. 568      
956-454 8   5562 METROPCS, INC. 568      
956-454 9   4290 STPCS JOINT VENTURE, LLC 568      
956-490 A HRLNTXKX8MD  5562 METROPCS, INC. 568      
956-490 0   145J TERRA NOVA TELECOM INC. 568   2025-10-31   
956-490 6   5562 METROPCS, INC. 568      
956-490 7   5562 METROPCS, INC. 568      
956-490 8   5562 METROPCS, INC. 568      

<< 1 2 3 4 5 6 7 >>

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.