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.

NPA: 779 [Rate centres in NPA 779] [Dial plan for NPA 779]

NXX: 507

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
779-507 A Rockford IL   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 360   2026-12-22   
779-507 2 Rockford IL   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 360   2026-12-22   

Last updated: Sun, 01 Nov 2026 02:11:49 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.