Question 1

Where is area code 231?

Accepted Answer

Area code 231 covers Muskegon and nearby cities including Norton Shores, Shelby in Michigan, in the Eastern Time.

Question 2

What cities use area code 231?

Accepted Answer

Area code 231 serves Muskegon, Norton Shores, Shelby in Michigan.

Question 3

What time zone is area code 231 in?

Accepted Answer

Area code 231 is in the Eastern Time (America/New_York).

Question 4

How do you dial a 231 number?

Accepted Answer

Dial all 10 digits: 231 followed by the 7-digit local number. From abroad, dial +1 231 and the local number.

Question 5

Is a call from area code 231 a scam?

Accepted Answer

A 231 number is geographically tied to Michigan, but caller ID can be spoofed, so the displayed area code does not prove where a caller really is. If you did not expect the call, do not share personal information and consider looking the number up.

Question 6

Is 231 a country code?

Accepted Answer

No. 231 is a US area code (a domestic 3-digit code), not a country code. The country (calling) code for the United States is +1, shared across the North American Numbering Plan. So a full 231 number written for international dialing looks like +1 231 followed by the 7-digit local number.

Area Code 231

Cities in area code 231

Area codes by city

Carriers in area code 231

Other Michigan area codes

Nearby area codes