| General Information about Area Code 231 | |
|---|---|
| Country | United States |
| State / Province / Territory | Michigan |
| Major City | Muskegon |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 231-647 | Coral | Montcalm | Landline |
| 231-439 | Petoskey | Emmet | Landline |
| 231-714 | Traverse City | Grand Traverse | Wireless |
| 231-680 | Reed City | Osceola | Landline |
| 231-923 | Hart | Oceana | Landline |
| 231-865 | Fruitport | Muskegon | Landline |
| 231-877 | Northport | Leelanau | Landline |
| 231-359 | Mecosta | Mecosta | Landline |
| 231-580 | Big Rapids | Mecosta | Landline |
| 231-209 | Suttons Bay | Leelanau | Landline |
| 231-819 | Tustin | Osceola | Landline |
| 231-403 | Williamsburg | Grand Traverse | Landline |
| 231-720 | Muskegon | Muskegon | Landline |
| 231-333 | Cheboygan | Cheboygan | Landline |
| 231-818 | Cheboygan | Cheboygan | Landline |
| 231-626 | Levering | Emmet | Landline |
| 231-577 | Cadillac | Wexford | Landline |
| 231-685 | Coopersville | Ottawa | Landline |
| 231-872 | Reed City | Osceola | Landline |
| 231-242 | Harbor Springs | Emmet | Landline |