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.

OCN: 7056 XO ILLINOIS, INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
312-284 A Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 0 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 1 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 2 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 3 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 4 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 5 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 6 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      
312-284 8 Chicago Zone 01-Franklin IL CHCGILTCDS4  358      

Last updated: Sun, 06 Oct 2024 02:51:32 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.