ILLINOIS · AREA CODE GUIDE
312 area code location: Chicago, Illinois
- Local date and time
- Central Time
Use arrow keys to pan. To zoom, use plus and minus, or hold Ctrl or ⌘ and scroll. On touch screens, use two fingers.
Download the 312 area code map
A printable area code 312 location map, with time zone and state. Use the PNG image in a document or slide; the SVG stays sharp at any size.
312 area code at a glance
- Country and calling code
- United States (+1)
- In service since
- New code planned
- No, as of 22 September 2026
An area code does not show where a caller is now.
Sources: NANPA area code listing, NANPA places by area code. Checked .
History
Time zone
- Central Time
- Standard time UTC−06:00
- Daylight saving time UTC−05:00
Where 312 reaches
312 numbers are issued across 1 community. These are telephone exchange areas, which follow the phone network rather than city limits, so a place can sit just outside the boundary of the town it is named for.
- Chicago
Notable places in 312
| Place | Where | What it is |
|---|---|---|
| Art Institute of Chicago | 6.9 km from Chicago | Museum |
| United Center | 4.9 km from Chicago | Stadium |
| Soldier Field | 6.3 km from Chicago | Stadium |
| University of Illinois Chicago | 4.9 km from Chicago | University, 36,493 12-month enrollment (2023–24) |
| Illinois Institute of Technology | 4.8 km from Chicago | University, 10,555 12-month enrollment (2023–24) |
| Field Museum of Natural History | 6.5 km from Chicago | Museum |
| Loyola University Chicago | 8.4 km from Chicago | University, 19,223 12-month enrollment (2023–24) |
| Shedd Aquarium | 6.8 km from Chicago | Zoo |
| Museum of Contemporary Art, Chicago | 8.5 km from Chicago | Museum |
| Meigs Field | 6.8 km from Chicago | Airport |
Questions about 312
Where is the 312 area code?
312 is in Illinois. Its numbers are issued in Chicago.
What time zone is area code 312 in?
312 is in Central Time. Daylight saving time is observed.
Does 312 have an overlay?
Yes. 872 was added as an overlay on 312 on 7 November 2009.
Business phone numbers in area code 312, answered by an AI agent
A local number for Chicago, Illinois, with an AI receptionist that takes caller details, answers the questions you give it, and books appointments. Numbers depend on what carriers have left.