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: 275

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
779-275 A Rockford IL RCFRILRTX6Y  495J STRATUS NETWORKS 360      
779-275 0 Rockford IL RCFRILRTX5Y  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 360   2023-12-16   
779-275 1 Rockford IL RCFRILRTX6Y  495J STRATUS NETWORKS 360   2020-09-20   
779-275 8 Rockford IL RCFRILRTTMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 360   2024-02-19   
779-275 9 Rockford IL RCFRILRTZMD  224C ONVOY, LLC 360   2024-02-24   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.