🇺🇸 United States · Michigan

Area code 231

Area code 231 is a telephone area code in Michigan, United States, covering Muskegon, Traverse City, Petoskey, Cadillac, Charlevoix, Manistee and more. Local time is UTC−5 (UTC−4 in summer). Numbers look like (231) 234-5678, or +1 231 234 5678 from abroad.

State: Michigan
Time zone: New York UTC−5 (UTC−4 in summer)
Local time now: –
Dial from abroad: +1 231

Places in area code 231

Cities and towns with telephone exchanges in the 231 area code, most exchanges first.

Muskegon
Traverse City
Petoskey
Cadillac
Charlevoix
Manistee
Big Rapids
Cheboygan
Norton Shores
Ludington
Whitehall
Cedar
Indian River
Kalkaska
Kingsley
Elk Rapids
Williamsburg
Suttons Bay
Interlochen
Honor
Glen Arbor
Frankfort
Northport
Mackinaw City

How to dial area code 231

Calling from	You dial
Inside the 231 area	231 234 5678 (10 digits)
Elsewhere in the US & Canada	1 231 234 5678
Any mobile phone, anywhere	+1 231 234 5678
UK, Europe, India and most countries	00 1 231 234 5678
Australia	0011 1 231 234 5678

Other area codes in Michigan

248 Troy, Southfield 269 Kalamazoo, Portage 313 Detroit, Dearborn 517 Lansing, East Lansing 586 Sterling Heights, Warren 616 Grand Rapids, Holland 734 Ann Arbor, Livonia 810 Flint, Brighton 906 Marquette, Escanaba 947 Michigan 989 Saginaw, Bay City

Area code 231: FAQ

Where is area code 231?

Area code 231 is in Michigan, United States and serves Muskegon, Traverse City, Petoskey, Cadillac, Charlevoix, Manistee. and other places

What time zone is area code 231 in?

Area code 231 is in the America/New_York time zone (UTC−5 (UTC−4 in summer)).

How do I call a 231 number from outside the US and Canada?

Dial your exit code (00 in most countries, or + on a mobile), then 1, then 231 and the seven-digit number. Example: +1 231 234 5678.

Is a call from area code 231 a scam?

Area code 231 is a regular North American area code, but caller ID can be spoofed: scammers often show local-looking numbers. Do not call back unknown numbers that ask for money or personal data, and check the number with the phone number validator to see whether it is valid and whether it is a mobile, landline or VoIP number.

Phone number API

Check 231 numbers in your app

numlookupapi checks any phone number worldwide in one request and returns validity, line type, carrier, location and every standard format as JSON.

Read the documentation

100 free requests every month. No credit card required.

GET https://api.numlookupapi.com/v1/validate/+12312345678

{
  "valid": true,
  "number": "12069220880",
  "local_format": "2069220880",
  "international_format": "+12069220880",
  "country_prefix": "+1",
  "country_code": "US",
  "country_name": "United States of America",
  "location": "Seattle",
  "line_type": "landline",
  "e164_format": "+12069220880",
  "national_format": "(206) 922-0880"
}