Phone prefix +1 (815) 566-XXXX
Phone prefix: +1815566
This prefix is distributed within the state Illinois
The largest city within this prefix is Belvidere, IL
District: Boone
The largest organization: Level 3 Communications
Time Zone: Central
Winter time: UTC-6
Summer time: UTC-5
The largest city within the prefix of +1 (815) 566-XXXX numbers is shown below
Belvidere, IL.