USA Phone Code Guide
USA Phone
Code Guide

Phone prefix +1 (312) 803-XXXX

Phone prefix: +1312803
This prefix is distributed within the state Illinois
The largest city within this prefix is Chicago, IL
District: Cook
The largest organization: Mci Worldcom Communications
Phone numbers of the state Illinois
Time Zone: Central
Winter time: UTC-6
Summer time: UTC-5
The largest city within the prefix of +1 (312) 803-XXXX numbers is shown below Chicago, IL.












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