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.

Switch: HSTNTXYAOMD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
281-533 5 Valley Lodge TX 515J IP HORIZON LLC 560   2025-03-03   
281-533 7 Valley Lodge TX 515J IP HORIZON LLC 560   2025-03-03   
346-359 3 Liverpool TX 515J IP HORIZON LLC 560   2025-05-01   
346-362 2 Sheldon TX 515J IP HORIZON LLC 560   2025-03-02   
346-438 A Houston TX 515J IP HORIZON LLC 560      
346-484 7 Sheldon TX 515J IP HORIZON LLC 560   2025-03-02   
346-486 5 Liverpool TX 515J IP HORIZON LLC 560   2025-05-01   
346-515 6 Richmond-Rosenberg TX 515J IP HORIZON LLC 560   2021-03-26   
346-536 0 Satsuma TX 515J IP HORIZON LLC 560   2021-03-21   
346-576 1 Barker TX 515J IP HORIZON LLC 560   2021-03-21   
346-640 0 Langham Creek TX 515J IP HORIZON LLC 560   2021-03-21   
346-645 2 Tomball TX 515J IP HORIZON LLC 560   2021-03-21   
346-654 4 Pinehurst TX 515J IP HORIZON LLC 560   2025-05-01   
346-654 8 Pinehurst TX 515J IP HORIZON LLC 560   2025-05-01   
346-686 1 Manvel TX 515J IP HORIZON LLC 560   2025-03-02   
346-686 3 Manvel TX 515J IP HORIZON LLC 560   2025-03-02   
346-705 0 Channelview TX 515J IP HORIZON LLC 560   2024-01-03   
346-713 4 Smithers Lake TX 515J IP HORIZON LLC 560   2025-05-04   
346-713 5 Smithers Lake TX 515J IP HORIZON LLC 560   2025-05-04   
346-713 8 Smithers Lake TX 515J IP HORIZON LLC 560   2024-01-03   
346-713 9 Smithers Lake TX 515J IP HORIZON LLC 560   2024-01-03   
346-735 6 Alvin TX 515J IP HORIZON LLC 560   2025-03-01   
346-735 7 Alvin TX 515J IP HORIZON LLC 560   2025-03-01   
346-784 7 Seabrook TX 515J IP HORIZON LLC 560   2025-03-02   
346-784 8 Seabrook TX 515J IP HORIZON LLC 560   2025-03-02   
346-790 1 La Porte TX 515J IP HORIZON LLC 560   2025-03-01   
346-790 2 La Porte TX 515J IP HORIZON LLC 560   2025-03-01   
346-797 8 Westfield TX 515J IP HORIZON LLC 560   2025-03-02   
346-797 9 Westfield TX 515J IP HORIZON LLC 560   2025-03-02   
346-798 2 Friendswood TX 515J IP HORIZON LLC 560   2025-03-01   
346-798 3 Friendswood TX 515J IP HORIZON LLC 560   2025-03-01   
346-821 8 Splendora TX 515J IP HORIZON LLC 560   2025-03-02   
346-821 9 Splendora TX 515J IP HORIZON LLC 560   2025-03-02   
346-844 8 Deer Park TX 515J IP HORIZON LLC 560   2025-03-01   
346-844 9 Deer Park TX 515J IP HORIZON LLC 560   2025-03-01   
346-853 A Houston Suburban TX 515J IP HORIZON LLC 560   2025-04-03   
346-853 1 Houston Suburban TX 515J IP HORIZON LLC 560   2025-04-03   
346-853 2 Houston Suburban TX 515J IP HORIZON LLC 560   2025-04-03   
346-856 A Channelview TX 515J IP HORIZON LLC 560   2025-04-03   
346-856 1 Channelview TX 515J IP HORIZON LLC 560   2025-04-03   
346-856 2 Channelview TX 515J IP HORIZON LLC 560   2025-04-03   
346-858 A Cleveland TX 515J IP HORIZON LLC 560   2025-04-03   
346-858 1 Cleveland TX 515J IP HORIZON LLC 560   2025-04-03   
346-858 2 Cleveland TX 515J IP HORIZON LLC 560   2025-04-03   
409-302 2 Texas City-La Marque TX 515J IP HORIZON LLC 560   2023-12-29   
409-334 8 Texas City-La Marque TX 515J IP HORIZON LLC 560   2025-03-06   
409-334 9 Texas City-La Marque TX 515J IP HORIZON LLC 560   2025-03-06   
409-360 A Galveston TX 515J IP HORIZON LLC 560   2025-04-03   
409-360 1 Galveston TX 515J IP HORIZON LLC 560   2025-04-03   
409-360 2 Galveston TX 515J IP HORIZON LLC 560   2025-04-03   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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