312 area code
Area code 312 is in Illinois, including Chicago. It's on Central Time.
Central Time
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Business hours are taken as 9 AM to 5 PM on weekdays. US telemarketing rules only allow sales calls between 8 AM and 9 PM local time.
Cities in area code 312
| City | Time zone |
|---|---|
| Chicago, IL | Central Time |
Other area codes in Illinois
More: look up another area code · time zone converter · US time zones map
Questions people ask
Where is area code 312?
Area code 312 is in Illinois, including Chicago.
What time zone is area code 312?
312 is on Central Time (UTC−6, UTC−5 in summer).
What time is it in area code 312 right now?
The live clock at the top of this page shows the current local time in area code 312.