231 area code: location, time zone and numbers
Grand Rapids, Michigan uses US telephone area code 231, which has served the area since 1999.
- Location
- Grand Rapids, Michigan
- Service start date
- 1999
- The time zone
- Eastern time
- Overlay
- None: no other code serves this area
- Calls within the area
- Dialling with 7 digits
- The rate centres
- 99
- Expected exhaust
- 2068
- Code for the country
- +1 (United States)
Sources: NANPA public reports, including the area code report and the rate-centre report, file dated 11/01/2026; for the exhaust year, NANPA projection file 2026-1 (April 2026). This site is not an official NANPA site.
Get your own 231 number
You can get a 231 number in two ways. When you sign up for a provider plan, it assigns a new number, chosen at sign-up from the numbers it keeps in the code. Sellers offer numbers they already hold for a one-time price, often with a pattern; you then transfer your chosen number to a provider.
Providers ranked by first-year cost
| Provider | Cheapest plan | First year | Link |
|---|---|---|---|
 Free app | Basic (Just for me), free | $0 | Open Google Voice |
 Free app | Free plan, free | $0 | Open TextNow |
 Developer API | Pay-as-you-go local number, $1.15 a month | $13.80 | Open Twilio |
 Second-number app | Standard, $3.99 a month billed yearly | $47.99 | Open Burner |
 Toll-free specialist | Solo, $6.99 a month billed yearly | $84 | Open UniTel Voice |
 Second-number app | Deluxe (local number), $6.99 a month billed yearly | $102.88 | Open GoDaddy Conversations (formerly Smartline) |
Sellers that list local numbers
| Seller | What it sells | Listed price | Monthly fee | Link |
|---|---|---|---|---|
 Marketplace | Local numbers | From $9 one-time | None stated | Search at Exclusive Digits |
 Marketplace | Local and toll-free | From $9.95 one-time | $2.99 a month | Search at NumberBarn |
 Number broker | Local and toll-free | From $99 one-time | None stated | Search at RingBoost |
 Number broker | Local and toll-free | From $100 one-time | None stated | Search at PhoneNumberExpert |
| 212areacode.comNumber broker | Local numbers | From $150 one-time | None stated | Search at 212areacode.com |
Some sellers and providers may pay us a referral fee. That does not affect the ranking, which follows first-year cost. How we earn
Places in the 231 area code
For 231, NANPA lists 99 rate centres. Numbers are assigned to these local calling areas:
Lake Leelanau, Levering, Le Roy, Lakes Of The North, Lake City, Lake Ann, Kingsley, Kalkaska, Kaleva, Irons, Interlochen, Indian River, Hoxeyville, Howard City, Honor, Holton, Hesperia, Hart, Harrietta, Harbor Springs, Grant, Glen Lake, Fruitport, Fremont, Freesoil, Frankfort, Fountain, Fife Lake, Falmouth, Evart, Elmira, Ellsworth, Elk Rapids, Eastport, East Jordan, Dublin, Coral, Copemish-thompsonville, Clam River, Chippewa Lake, Cheboygan, Charlevoix, Central Lake, Carr, Cadillac, Buckley, Brutus, Brethren, Boyne Falls, Boyne City, Bois Blanc, Big Rapids, Beulah, Bellaire, Bear Lake, Baldwin, Amble, Alden, Alba, Alanson and 39 more.
Area codes that are related
Other codes in Michigan: 313, 517, 616, 906, 810, 248, 734, 989, 586, 269, 947 plus 679.
231 area code questions
In which area is 231 used?
231 is the code for Grand Rapids, Michigan, and the surrounding Grand Rapids-Wyoming-Kentwood, MI area.
Which country code applies to 231 numbers?
+1. Because 231 belongs to the North American Numbering Plan, calls from abroad use +1 231 and the 7-digit number.
What time is it in the 231 area code?
The 231 area observes Eastern time.
Which callers use 231?
Calls can come from anyone with a number in this code, including homes, mobiles, local businesses and people who fake a local number. What a 231 number tells you on your screen is where it was assigned, not who is calling.