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: SNDGCA0200Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
442-358 1 Ramona CA 490J BOOST SUBSCRIBERCO L.L.C. 732   2023-11-27   
442-367 1 Calexico CA 490J BOOST SUBSCRIBERCO L.L.C. 732   2023-07-01   
442-404 A Vista CA 490J BOOST SUBSCRIBERCO L.L.C. 732      
442-404 9 Vista CA 490J BOOST SUBSCRIBERCO L.L.C. 732   2023-08-04   
442-464 6 Vista CA 490J BOOST SUBSCRIBERCO L.L.C. 732   2025-11-15   
442-646 2 Brawley CA 490J BOOST SUBSCRIBERCO L.L.C. 732   2023-11-27   
619-912 2 El Cajon CA 490J BOOST SUBSCRIBERCO L.L.C. 732   2024-09-07   
858-341 6 Chula Vista CA 490J BOOST SUBSCRIBERCO L.L.C. 732   2023-11-27   
858-398 1 San Diego: Mira Mesa DA CA 490J BOOST SUBSCRIBERCO L.L.C. 732   2023-07-01   
858-441 4 El Cajon CA 490J BOOST SUBSCRIBERCO L.L.C. 732   2025-12-25   
858-445 4 San Diego: Mira Mesa DA CA 490J BOOST SUBSCRIBERCO L.L.C. 732   2026-01-26   
858-445 5 San Diego: Mira Mesa DA CA 490J BOOST SUBSCRIBERCO L.L.C. 732   2026-06-13   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.