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: RCFRILRTZMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
779-221 A Rockford IL 224C ONVOY, LLC 360      
779-387 A Poplar Grove IL 224C ONVOY, LLC 360   2024-05-12   
779-389 A Garden Prairie IL 224C ONVOY, LLC 360      
779-666 A Rockford IL 224C ONVOY, LLC 360      
779-774 A Rockford IL 224C ONVOY, LLC 360      
779-778 A Winnebago IL 224C ONVOY, LLC 360      
779-789 A Rockton IL 224C ONVOY, LLC 360      
779-888 A Rockford IL 224C ONVOY, LLC 360      
815-312 A Rockford IL 224C ONVOY, LLC 360   2024-12-29   
815-420 A Rockford IL 224C ONVOY, LLC 360      
815-604 A Belvidere IL 224C ONVOY, LLC 360      
815-668 A Rockford IL 224C ONVOY, LLC 360      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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