World Time Zone Map Illinois Area Codes 312

312 Area code

Central Time


Wednesday, September 23, 2020

312 is an area code located in the state of Illinois, US. The largest city it serves is Chicago.

Location, time zone and map of the 312 area code

Local time

8:13:54 AM, Wednesday 23, September 2020 CDT    24 hours


Time difference to GMT/UTC

Standard time: UTC/GMT -6:00 hours
Daylight saving time: +1:00 hour
Current time zone offset: UTC/GMT -5:00 hours
Time zone abbreviation: CDT

Daylight Saving Time 2020 (Summer Time)

DST starts on Sunday 08 March 2020, 02:00
DST ends on Sunday 01 November 2020, 02:00


Time zone

The 312 area code lies within the Central Time (CT)

CST - Central Standard Time
CDT - Central Daylight Time when daylight saving time is being observed (from early March to early November)



Major cities and communities served by area code 312

Cook County
  • Chicago
  • Schaumburg
  • Wheeling
DuPage County
  • Hinsdale

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