How do I dial area code 312 from abroad?

Dial +1 312 followed by the 7-digit local number. For example: +1-312-XXX-XXXX.

DialHard - Area Code 312: Chicago, IL

Q: What area does 312 cover?

Area code 312 covers Chicago, IL in Illinois.

Q: What time zone is area code 312?

Area code 312 is in the Central Time time zone (CST).

What area does 312 cover?

Area code 312 covers Chicago, IL in Illinois. This includes the Chicago, IL metropolitan area and surrounding communities.

What time zone is area code 312?

Central Time (CST)

Current local time: --:--

Fair time to call this area

Early morning · OK for personal calls. Not ideal for business.

How do I dial area code 312?

From within the US

312-XXX-XXXX or 1-312-XXX-XXXX

Most areas require 10-digit dialing even for local calls.

From abroad

+1 312 XXX XXXX

Replace +1 with your country's international dialing prefix if your phone doesn't support +.

Storing in contacts

+1312XXXXXXX

Use E.164 format (+1 followed by all 10 digits) for maximum compatibility.

Is 312 a mobile or landline area code?

In the US, area codes don't distinguish between mobile and landline numbers. A 312 number could be either. Number portability allows people to keep their numbers when switching between mobile and landline service.

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