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: CHCGILDTDMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
312-270 7 Chicago Zone 01-Calumet IL 156J RCLEC, INC. 358      
312-690 A Chicago Zone 01-Calumet IL 156J RCLEC, INC. 358      
312-690 4 Chicago Zone 01-Calumet IL 156J RCLEC, INC. 358      
312-858 A Chicago Zone 01-Calumet IL 156J RCLEC, INC. 358      
312-858 1 Chicago Zone 01-Calumet IL 156J RCLEC, INC. 358      
312-858 2 Chicago Zone 01-Calumet IL 156J RCLEC, INC. 358      
312-858 3 Chicago Zone 01-Calumet IL 156J RCLEC, INC. 358      
312-858 4 Chicago Zone 01-Calumet IL 156J RCLEC, INC. 358      
312-858 5 Chicago Zone 01-Calumet IL 156J RCLEC, INC. 358      
312-858 6 Chicago Zone 01-Calumet IL 156J RCLEC, INC. 358      
312-858 7 Chicago Zone 01-Calumet IL 156J RCLEC, INC. 358      
312-858 8 Chicago Zone 01-Calumet IL 156J RCLEC, INC. 358      
312-858 9 Chicago Zone 01-Calumet IL 156J RCLEC, INC. 358      
773-832 7 Chicago Zone 04-Lakeview IL 156J RCLEC, INC. 358      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.