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

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
346-438 A Houston TX 515J IP HORIZON LLC 560      
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   
346-705 0 Channelview TX 515J IP HORIZON LLC 560   2024-01-03   
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   
409-302 2 Texas City-La Marque TX 515J IP HORIZON LLC 560   2023-12-29   
936-353 8 Timpson TX 515J IP HORIZON LLC 560   2023-12-28   
936-353 9 Timpson TX 515J IP HORIZON LLC 560   2023-12-28   
936-354 0 Huntsville TX 515J IP HORIZON LLC 560   2023-12-28   
936-359 8 Chireno TX 515J IP HORIZON LLC 560   2023-12-28   
936-359 9 Chireno TX 515J IP HORIZON LLC 560   2023-12-28   
979-234 8 Eagle Lake TX 515J IP HORIZON LLC 560   2023-12-28   
979-274 7 Bellville TX 515J IP HORIZON LLC 560   2023-12-28   
979-276 3 Garwood TX 515J IP HORIZON LLC 560   2024-05-17   
979-346 9 Matagorda TX 515J IP HORIZON LLC 560   2024-05-17   
979-360 1 Brenham TX 515J IP HORIZON LLC 560   2023-12-28   
979-407 A Sealy TX 515J IP HORIZON LLC 560   2024-06-15   
979-407 1 Sealy TX 515J IP HORIZON LLC 560   2024-06-15   
979-493 8 Columbus TX 515J IP HORIZON LLC 560   2023-12-28   
979-607 2 El Campo TX 515J IP HORIZON LLC 560   2023-12-28   
979-608 3 Bellville TX 515J IP HORIZON LLC 560   2023-12-28   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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