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.

Sanborn, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
712-630 A SXCYIADTRMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 630      
712-729 A SNBRIAXO1MD  1259 NORTHERN IOWA TEL. CO. 630      
712-930 A SNBRIA01RS0  3112 COMMUNITY CABLE TV AGCY O'BRIEN CO. DBA COMM.-IA 630      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.