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: HRLNTXHGXPX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
956-209 4 Mission TX 515J IP HORIZON LLC 568   2025-05-04   
956-209 5 Mission TX 515J IP HORIZON LLC 568   2025-05-04   
956-395 9 Rio Hondo TX 515J IP HORIZON LLC 568   2023-12-28   
956-453 0 Harlingen TX 515J IP HORIZON LLC 568   2025-05-04   
956-453 1 Harlingen TX 515J IP HORIZON LLC 568   2025-05-04   
956-594 A Brownsville TX 515J IP HORIZON LLC 568      
956-637 1 Rio Hondo TX 515J IP HORIZON LLC 568   2023-12-28   
956-674 7 Los Fresnos TX 515J IP HORIZON LLC 568   2023-12-28   
956-674 8 Los Fresnos TX 515J IP HORIZON LLC 568   2023-12-28   
956-695 2 San Benito TX 515J IP HORIZON LLC 568   2023-12-28   
956-697 5 Port Isabel TX 515J IP HORIZON LLC 568   2023-12-28   
956-697 9 Port Isabel TX 515J IP HORIZON LLC 568   2023-12-28   
956-719 1 Rio Hondo TX 515J IP HORIZON LLC 568   2025-05-04   
956-719 2 Rio Hondo TX 515J IP HORIZON LLC 568   2025-05-04   
956-741 5 Mercedes TX 515J IP HORIZON LLC 568   2025-05-04   
956-741 6 Mercedes TX 515J IP HORIZON LLC 568   2025-05-04   
956-745 0 Falcon Heights TX 515J IP HORIZON LLC 568   2023-12-28   
956-745 1 Falcon Heights TX 515J IP HORIZON LLC 568   2023-12-28   
956-745 3 Falcon Heights TX 515J IP HORIZON LLC 568   2025-05-04   
956-745 4 Falcon Heights TX 515J IP HORIZON LLC 568   2025-05-04   
956-761 9 Port Isabel TX 515J IP HORIZON LLC 568   2025-05-04   
956-788 6 San Benito TX 515J IP HORIZON LLC 568   2025-05-04   
956-788 7 San Benito TX 515J IP HORIZON LLC 568   2025-05-04   
956-807 6 Donna TX 515J IP HORIZON LLC 568   2024-06-24   
956-807 7 Donna TX 515J IP HORIZON LLC 568   2024-06-24   
956-823 2 Donna TX 515J IP HORIZON LLC 568   2025-05-04   
956-823 3 Donna TX 515J IP HORIZON LLC 568   2025-05-04   
956-934 3 San Benito TX 515J IP HORIZON LLC 568   2023-12-28   
956-943 8 Port Isabel TX 515J IP HORIZON LLC 568   2025-05-04   
956-953 2 Los Fresnos TX 515J IP HORIZON LLC 568   2025-05-04   
956-953 3 Los Fresnos TX 515J IP HORIZON LLC 568   2025-05-04   
956-991 A Edinburg TX 515J IP HORIZON LLC 568   2025-06-01   
956-991 1 Edinburg TX 515J IP HORIZON LLC 568   2025-06-01   
956-991 2 Edinburg TX 515J IP HORIZON LLC 568   2025-06-01   
956-993 A Brownsville TX 515J IP HORIZON LLC 568   2025-06-01   
956-993 1 Brownsville TX 515J IP HORIZON LLC 568   2025-06-01   
956-993 2 Brownsville TX 515J IP HORIZON LLC 568   2025-06-01   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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