Area Code Box

Area code 231

Where is area code 231?

Muskegon, Traverse City and Petoskey, Michigan

Local time: … (Eastern Time)

StateMichigan
CountryUnited States
Main citiesMuskegon, Traverse City and Petoskey
Time zoneEastern Time
Overlay area codesNone
In service since1999 (created from 616)
Assigned prefixes572
Dialing format(231) XXX-XXXX · +1 231 XXX XXXX from abroad

Look up a 231 number

Enter a 3-digit area code or a full 10-digit number.

Cities and towns in area code 231

Listed by how many phone prefixes (the 3 digits after the area code) are assigned to each place in 231.

Phone companies in area code 231

The carriers that hold the most 231 prefixes. People can move their number to another carrier, so this shows who first issued a number, not who serves it today.

PrefixesCarrier
72New Cingular Wireless PCS (AT&T)
72Michigan Bell Tel Co (AT&T)
52Frontier North
49Onvoy, Llcv
43Interactive Services Network
42Verizon Wireless
34123.net
28Omnipoint Communications Midwest Operations (T-Mobile)

All 572 prefixes in area code 231

Pick the 3 digits after the area code to see that prefix’s city and carrier.

Questions

Where is area code 231?
Area code 231 is in Michigan. It serves Muskegon, Traverse City, Petoskey, Cadillac and Big Rapids and 95 other cities and towns.
What time zone is area code 231 in?
Area code 231 uses Eastern Time.
Is a call from area code 231 a scam?
The area code alone doesn’t tell you. Most calls from 231 are ordinary local calls, but scammers can fake (“spoof”) any number. If you don’t recognize a 231 number, let it go to voicemail.
When did area code 231 start?
231 went into service in 1999. It was created from area code 616.
Can a 231 number be outside Michigan?
Yes. People keep their numbers when they move and when they switch to mobile or internet phone services, so a 231 caller can be anywhere.

Other area codes in Michigan

Area codeMain cities
248Pontiac, Troy and Southfield
269Kalamazoo, Battle Creek and Benton Harbor
313Detroit, Dearborn and Redford Charter Township
517Lansing, Jackson and Adrian
586Clinton Twp, Sterling Heights and Saint Clair Shores
616Grand Rapids, Holland and Grand Haven
679Detroit, Dearborn and Redford Charter Township
734Ann Arbor, Livonia and Westland
810Flint, Lapeer and Port Huron
906Marquette, Iron Mountain and Escanaba
947Ortonville, Clarkston and Troy
989Saginaw, Midland and Bay City