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.

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
956-613 2 Roma TX 903C ONVOY, LLC - TX 568   2021-03-07   
956-613 3 Roma TX 903C ONVOY, LLC - TX 568   2021-03-07   
956-613 7 Roma TX 903C ONVOY, LLC - TX 568   2024-03-03   
956-614 2 Zapata TX 903C ONVOY, LLC - TX 568   2020-08-24   
956-614 4 Zapata TX 903C ONVOY, LLC - TX 568   2020-08-24   
956-633 2 Santa Rosa TX 903C ONVOY, LLC - TX 568   2017-05-03   
956-633 4 Santa Rosa TX 903C ONVOY, LLC - TX 568   2020-08-24   
956-633 5 Santa Rosa TX 903C ONVOY, LLC - TX 568   2020-08-24   
956-634 A Mercedes TX 903C ONVOY, LLC - TX 568      
956-634 0 Mercedes TX 903C ONVOY, LLC - TX 568   2025-05-10   
956-634 2 Mercedes TX 903C ONVOY, LLC - TX 568   2021-12-24   
956-634 5 Mercedes TX 903C ONVOY, LLC - TX 568   2021-12-24   
956-634 7 Mercedes TX 903C ONVOY, LLC - TX 568   2023-08-12   
956-634 8 Mercedes TX 903C ONVOY, LLC - TX 568   2023-08-12   
956-637 2 Rio Hondo TX 903C ONVOY, LLC - TX 568   2021-08-28   
956-637 3 Rio Hondo TX 903C ONVOY, LLC - TX 568   2021-08-28   
956-637 7 Rio Hondo TX 903C ONVOY, LLC - TX 568   2021-09-30   
956-637 8 Rio Hondo TX 903C ONVOY, LLC - TX 568   2021-09-30   
956-643 3 Brownsville TX 903C ONVOY, LLC - TX 568   2022-03-11   
956-643 4 Brownsville TX 903C ONVOY, LLC - TX 568   2022-03-11   
956-644 6 Zapata TX 903C ONVOY, LLC - TX 568   2025-04-13   
956-646 3 Donna TX 903C ONVOY, LLC - TX 568   2023-05-30   
956-646 7 Donna TX 903C ONVOY, LLC - TX 568   2023-08-12   
956-654 3 Harlingen TX 903C ONVOY, LLC - TX 568   2024-02-26   
956-654 6 Harlingen TX 903C ONVOY, LLC - TX 568   2024-02-26   
956-658 7 McAllen TX 903C ONVOY, LLC - TX 568   2022-03-12   
956-658 8 McAllen TX 903C ONVOY, LLC - TX 568   2022-03-12   
956-660 8 Harlingen TX 903C ONVOY, LLC - TX 568   2025-04-12   
956-660 9 Harlingen TX 903C ONVOY, LLC - TX 568   2025-04-12   
956-663 A Edinburg TX 903C ONVOY, LLC - TX 568      
956-663 2 Edinburg TX 903C ONVOY, LLC - TX 568   2022-03-12   
956-663 3 Edinburg TX 903C ONVOY, LLC - TX 568   2022-01-01   
956-663 4 Edinburg TX 903C ONVOY, LLC - TX 568   2022-01-01   
956-666 7 Pharr TX 903C ONVOY, LLC - TX 568   2019-05-07   
956-666 8 Pharr TX 903C ONVOY, LLC - TX 568   2019-05-07   
956-670 0 Edinburg TX 903C ONVOY, LLC - TX 568   2023-08-14   
956-670 2 Edinburg TX 903C ONVOY, LLC - TX 568   2023-07-09   
956-670 3 Edinburg TX 903C ONVOY, LLC - TX 568   2023-07-09   
956-670 4 Edinburg TX 903C ONVOY, LLC - TX 568   2023-07-09   
956-670 5 Edinburg TX 903C ONVOY, LLC - TX 568   2023-08-14   
956-670 8 Edinburg TX 903C ONVOY, LLC - TX 568   2023-08-14   
956-672 6 Mission TX 903C ONVOY, LLC - TX 568   2022-03-21   
956-672 7 Mission TX 903C ONVOY, LLC - TX 568   2022-03-21   
956-673 0 Pharr TX 903C ONVOY, LLC - TX 568   2021-11-25   
956-673 2 Pharr TX 903C ONVOY, LLC - TX 568   2021-11-14   
956-673 3 Pharr TX 903C ONVOY, LLC - TX 568   2021-11-14   
956-673 4 Pharr TX 903C ONVOY, LLC - TX 568   2021-11-14   
956-674 0 Los Fresnos TX 903C ONVOY, LLC - TX 568   2023-08-14   
956-674 2 Los Fresnos TX 903C ONVOY, LLC - TX 568   2022-09-26   
956-676 2 Brownsville TX 903C ONVOY, LLC - TX 568   2023-01-07   

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Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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