Phone prefix +1-312203
Phone prefix: +1312203
This prefix is distributed within the state Illinois
The largest city within this prefix is Chicago, IL
District: Cook
The largest organization: New Cingular Wireless PCS
![Phone numbers of the state Illinois](/img/map/14m.jpg)
Time Zone: Central
Winter time: UTC-6
Summer time: UTC-5
The largest city within the prefix of +1-312203.... numbers is shown below
Chicago, IL.
Subscribers’ phone numbers +1-312-203-YYYY
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Companies’ phone numbers +1-312-203-YYYY
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