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: SLNTCAPS5MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
831-203 A Salinas CA 732J NUSO, LLC 736      
831-203 1 Salinas CA 732J NUSO, LLC 736   2023-10-13   
831-664 3 Hollister CA 732J NUSO, LLC 736   2024-12-16   
831-859 0 Salinas CA 732J NUSO, LLC 736   2024-09-21   
831-859 1 Salinas CA 732J NUSO, LLC 736   2024-09-21   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.