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Area Code 231

Area code 231 is in Michigan, USA , spanning 22 counties and serving 141 cities, including Muskegon, Traverse City or Cadillac; it currently uses 568 prefixes, assigned from 231-201-XXXX through 231-999-XXXX.

In service date for area code 231: June 05, 1999.

The current local time is .

231 area code location on a map
© OpenStreetMap contributors
For exact NPA boundaries see official 231 area code map

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Locate any 231-NXX prefix:

NPANXX Area Served1 Date2
231-201 Chippewa Lake 3/5/2004
231-202 Mecosta 3/5/2004
231-203 Alanson 3/19/2004
231-204 Fife Lake N/A
231-205 Brutus 3/24/2004
231-206 Muskegon N/A
231-207 Honor 3/24/2004
231-208 Boyne Falls 3/24/2004
231-209 Suttons Bay 3/25/2004
231-210 St James 07/11/2023
231-212 Interlochen 7/25/2016
231-213 Traverse City 3/26/2015
231-215 Muskegon N/A
231-216 Frankfort 12/1/2015
231-217 Bear Lake 3/24/2004
231-218 Traverse City N/A
231-219 Merritt 3/24/2004
231-220 Muskegon 3/25/2003
231-221 Harbor Springs 6/1/2015
231-222 East Jordan 4/4/2002
231-223 Old Mission N/A
231-224 Fremont N/A
231-225 Fremont 4/4/2002
231-226 Glen Lake 3/24/2004
231-227 Honor 9/26/2012
231-228 Glen Lake N/A
231-229 Moorestown N/A
231-230 Elmira 3/24/2004
231-232 Moorestown 3/24/2004
231-233 Ludington 8/30/2004
231-234 Buckley 12/7/2015
231-235 Levering 3/24/2004
231-236 Lake City 3/24/2004
231-237 Charlevoix N/A
231-238 Indian River N/A
231-239 Ludington 4/28/2004
231-240 Lake Ann 3/24/2004
231-241 Pentwater 10/10/2006
231-242 Harbor Springs N/A
231-243 Alanson 3/24/2004
231-244 Boyne City 8/26/2015
231-245 Newaygo 7/17/2009
231-246 Muskegon 12/22/2015
231-247 Williamsburg 9/28/2018
231-249 Cheboygan N/A
231-250 Big Rapids N/A
231-251 Lake Leelanau 12/2/2015
231-252 Traverse City 4/18/2016
231-253 Cadillac 11/8/2018
231-254 Petoskey 10/24/2019
231-255 Onekama N/A
231-256 Lake Leelanau N/A
231-257 Lake City 2/27/2019
231-258 Kalkaska N/A
231-259 Shelby 2/7/2007
231-260 Muskegon 3/3/2017
231-261 Ludington 12/31/2018
231-262 Elmira 1/21/2005
231-263 Kingsley N/A
231-264 Elk Rapids N/A
231-265 Coral 5/19/2014
231-266 Irons N/A
231-267 Williamsburg N/A
231-268 Cheboygan 7/12/2004
231-269 Buckley N/A
231-270 Boyne City 5/21/2021
231-271 Suttons Bay N/A
231-272 Kingsley 8/8/2019
231-273 Eastport 10/26/2020
231-274 Traverse City N/A
231-275 Lake Ann N/A
231-276 Interlochen N/A
231-277 Fountain 3/22/2016
231-278 Hesperia 10/26/2020
231-279 Big Rapids 12/20/2019
231-280 Mancelona 2/29/2016
231-281 Cadillac 11/3/2020
231-282 Grant N/A
231-283 Muskegon 11/9/2020
231-284 Manistee 3/1/2021
231-285 Cadillac 1/9/2020
231-286 Muskegon N/A
231-287 Big Rapids N/A
231-288 Muskegon 9/13/2005
231-289 Charlevoix 7/19/2018
231-290 Indian River N/A
231-291 Muskegon 5/11/2012
231-292 Whitehall 7/30/2010
231-293 Frankfort 5/14/2021
231-294 Fife Lake 6/15/2021
231-295 Lake City 9/26/2012
231-296 Fremont 5/13/2021
231-297 Kingsley 6/25/2021
231-298 Irons 5/13/2021
231-299 Manistee 12/28/2011
NPANXX Area Served1 Date2
231-300 Alden 9/7/2017
231-301 Hart N/A
231-302 Petoskey N/A
231-303 Newaygo 5/16/2011
231-304 Brutus 10/26/2020
231-305 Big Rapids N/A
231-306 Cadillac N/A
231-307 Morley N/A
231-308 Charlevoix N/A
231-309 Manistee N/A
231-310 Falmouth 9/25/2018
231-312 Frankfort N/A
231-313 Traverse City N/A
231-314 Kalkaska N/A
231-315 Muskegon N/A
231-316 Ludington N/A
231-317 Boyne City N/A
231-318 Traverse City N/A
231-319 Mackinaw City N/A
231-320 Torch River Bridge 9/3/2021
231-321 Elmira 5/19/2021
231-322 Torch River Bridge N/A
231-323 East Jordan N/A
231-324 Harbor Springs 5/25/2021
231-325 Honor N/A
231-326 Glen Lake N/A
231-327 Muskegon N/A
231-328 Merritt N/A
231-329 Muskegon N/A
231-330 Petoskey 12/10/2002
231-331 Alden N/A
231-332 Muskegon N/A
231-333 Cheboygan 4/4/2002
231-334 Glen Lake N/A
231-335 Fremont N/A
231-336 Ludington N/A
231-337 Mcbain N/A
231-338 Baldwin N/A
231-339 Muskegon N/A
231-340 Elmira 7/9/2003
231-342 Traverse City N/A
231-343 Muskegon N/A
231-344 Petoskey N/A
231-345 Reed City N/A
231-346 Traverse City N/A
231-347 Petoskey N/A
231-348 Petoskey N/A
231-349 Big Rapids N/A
231-350 Bellaire 7/9/2003
231-351 Scottville N/A
231-352 Frankfort N/A
231-353 Mcbain N/A
231-354 Coral N/A
231-355 Fremont N/A
231-356 Mancelona N/A
231-357 Traverse City N/A
231-358 Central Lake N/A
231-359 Mecosta 9/26/2012
231-360 Traverse City 12/30/2002
231-361 Morley N/A
231-362 Kaleva N/A
231-363 Cheboygan N/A
231-364 Northport 6/15/2021
231-365 Wolverine N/A
231-366 Fruitport 2/27/2003
231-367 Wolverine 6/25/2021
231-368 Baldwin N/A
231-369 Soboardman N/A
231-370 Muskegon 9/3/2021
231-371 Tustin 9/3/2021
231-372 Evart N/A
231-373 Petoskey 4/27/2004
231-374 Shelby 6/15/2021
231-375 Muskegon N/A
231-376 Twin Lake 7/2/2021
231-377 Clam River N/A
231-378 Copemish Thompsonville N/A
231-379 Onekama 8/26/2021
231-380 Newaygo 1/10/2022
231-381 Whitecloud 5/13/2021
231-383 Beulah 4/29/2003
231-384 Kalkaska 5/1/2003
231-385 Coral 7/20/2021
231-386 Northport N/A
231-387 Petoskey 10/6/2021
231-388 Le Roy 5/1/2003
231-389 Harrietta N/A
231-390 Big Rapids 10/26/2021
231-391 Glen Lake 7/2/2021
231-392 Traverse City 1/9/2001
231-393 Le Roy 7/2/2021
231-394 Moorestown 7/29/2003
231-395 Grant N/A
231-396 Cadillac 10/29/2021
231-397 Manistee 11/3/2021
231-398 Manistee N/A
231-399 Frankfort 1/19/2005
NPANXX Area Served1 Date2
231-400 Alanson 10/10/2019
231-401 Traverse City 12/21/2021
231-402 Muskegon 1/21/2022
231-403 Williamsburg 8/16/2011
231-404 Stanwood 10/5/2004
231-405 Alden 2/4/2022
231-406 Falmouth 2/4/2022
231-407 Mecosta 2/4/2022
231-408 Big Rapids N/A
231-409 Traverse City N/A
231-410 Manistee 8/12/2022
231-412 Harbor Springs 10/11/2010
231-413 Kalkaska 2/14/2022
231-414 Newaygo N/A
231-415 Dublin 12/5/2022
231-416 Big Rapids N/A
231-417 Petoskey 01/06/2023
231-418 Marion 07/11/2023
231-419 Bellaire 07/11/2023
231-420 Cheboygan N/A
231-421 Traverse City 2/20/2002
231-422 Pellston 8/25/2015
231-423 Evart N/A
231-424 Carr 1/27/2005
231-425 Ludington N/A
231-426 Ravenna 07/11/2023
231-427 Mackinaw City 8/17/2011
231-428 Muskegon 07/14/2023
231-429 Cadillac 12/5/2002
231-430 Boyne City 07/14/2023
231-431 Clam River 5/19/2021
231-432 Northport 8/30/2002
231-433 Moorestown 4/29/2011
231-434 Manton 9/26/2014
231-435 Eastport 07/14/2023
231-436 Mackinaw City N/A
231-437 Charlevoix N/A
231-438 Harbor Springs 07/14/2023
231-439 Petoskey N/A
231-440 Baldwin 8/27/2002
231-441 Fife Lake 8/27/2002
231-442 Harrietta 12/1/2015
231-443 Honor 1/8/2021
231-444 Cadillac 8/24/2015
231-445 Cheboygan 8/24/2004
231-446 Northport 07/14/2023
231-447 Holton 12/2/2015
231-448 St James N/A
231-449 Baldwin 5/13/2021
231-450 Hesperia 1/19/2005
231-451 Williamsburg 07/14/2023
231-452 Newaygo 2/8/2001
231-453 Holton 03/01/2024
231-454 Traverse City 9/23/2021
231-455 Pentwater 1/8/2021
231-456 Glen Lake 09/05/2024
231-457 Muskegon N/A
231-459 Boyne City 1/9/2004
231-460 Big Rapids N/A
231-462 Fountain N/A
231-463 Traverse City N/A
231-464 Freesoil N/A
231-465 Reed City N/A
231-466 Evart 7/2/2021
231-468 Cadillac 2/5/2001
231-475 Manton 7/2/2021
231-477 Brethren N/A
231-480 Ludington 5/23/2002
231-484 East Jordan 8/7/2013
231-486 Traverse City N/A
231-487 Petoskey N/A
231-488 Manistee 8/27/2002
231-489 Petoskey 4/21/2015
231-492 Traverse City N/A
231-493 Traverse City 5/17/2017
231-494 Big Rapids N/A
231-495 Bellaire 7/29/2016
231-497 Boyne City N/A
231-498 Elk Rapids 10/20/2004
231-499 Traverse City N/A
NPANXX Area Served1 Date2
231-500 Whitehall 10/10/2019
231-508 Onekama 6/3/2008
231-510 Manistee N/A
231-512 Traverse City N/A
231-514 Cadillac N/A
231-515 Evart 1/19/2005
231-516 Petoskey N/A
231-518 Kalkaska 6/18/2001
231-519 Newaygo 7/19/2002
231-520 Charlevoix 8/27/2002
231-522 Luther N/A
231-525 Wolverine N/A
231-526 Harbor Springs N/A
231-527 Big Rapids N/A
231-529 Brutus N/A
231-531 Muskegon 4/9/2019
231-533 Bellaire N/A
231-534 Traverse City 10/30/2002
231-535 Walloon Lk N/A
231-536 East Jordan N/A
231-537 Levering N/A
231-538 Fremont 8/27/2002
231-539 Pellston N/A
231-544 Central Lake N/A
231-545 Boyne Falls 9/23/2016
231-546 Elmira N/A
231-547 Charlevoix N/A
231-548 Alanson N/A
231-549 Boyne Falls N/A
231-550 Petoskey 9/22/2021
231-557 Muskegon N/A
231-559 Mcbain 8/1/2012
231-563 Muskegon 1/9/2001
231-564 Kalkaska N/A
231-566 Harrietta 2/22/2022
231-567 Muskegon 12/2/2020
231-568 Traverse City N/A
231-569 Petoskey N/A
231-570 Fife Lake 3/29/2002
231-571 Muskegon N/A
231-577 Cadillac 5/14/2002
231-578 Muskegon N/A
231-580 Big Rapids 2/5/2001
231-581 Alba 4/20/2017
231-582 Boyne City N/A
231-583 Ludington 8/27/2002
231-584 Alba N/A
231-585 Lake North N/A
231-587 Mancelona N/A
231-588 Ellsworth N/A
231-590 Traverse City N/A
231-591 Big Rapids N/A
231-592 Big Rapids N/A
231-593 Cadillac N/A
231-594 Hart 3/7/2001
231-596 Harbor Springs N/A
231-597 Cheboygan N/A
231-598 Big Rapids N/A
231-599 Eastport N/A
NPANXX Area Served1 Date2
231-600 Traverse City 12/19/2019
231-604 Kalkaska N/A
231-605 Newaygo N/A
231-608 Frankfort N/A
231-613 Scottville N/A
231-614 Pentwater 10/12/2001
231-615 Cheboygan N/A
231-620 Traverse City N/A
231-622 Petoskey 8/19/2002
231-624 Kalkaska N/A
231-625 Cheboygan N/A
231-626 Levering 9/26/2012
231-627 Cheboygan N/A
231-629 Big Rapids N/A
231-631 Traverse City 8/31/2001
231-632 Traverse City N/A
231-633 Traverse City N/A
231-634 Bois Blanc N/A
231-635 Mackinaw City 8/27/2002
231-636 Howard City 8/12/2002
231-637 Northport 8/31/2001
231-638 Muskegon 3/9/2001
231-639 Beulah 8/27/2002
231-640 Lake Ann 8/30/2002
231-642 Traverse City 4/2/2001
231-643 Morley 8/27/2002
231-645 Traverse City N/A
231-646 Ellsworth 6/18/2001
231-647 Coral 8/27/2001
231-648 Howard City 1/9/2001
231-649 Traverse City 7/19/2002
231-651 Beulah 8/30/2002
231-652 Newaygo N/A
231-655 Manistee 12/19/2014
231-656 Kalkaska 8/27/2002
231-660 Big Rapids 8/27/2002
231-663 Mesick 3/7/2022
231-666 Muskegon 10/9/2017
231-667 Marion 8/30/2002
231-668 Traverse City 4/29/2002
231-670 Muskegon 2/21/2001
231-672 Muskegon 11/12/2001
231-674 Grant 5/18/2001
231-675 Boyne City 3/29/2002
231-676 Bellaire 8/30/2002
231-678 Brethren 1/19/2005
231-679 Big Rapids 10/24/2002
231-680 Reed City 8/19/2002
231-681 Fruitport 6/18/2001
231-682 Alden 4/22/2002
231-683 Muskegon 7/9/2001
231-685 Ravenna 9/25/2014
231-686 Frankfort 8/27/2002
231-688 Merritt 2/19/2020
231-689 Whitecloud N/A
231-690 Ludington 7/19/2002
231-695 Howard City 7/11/2001
231-699 Fountain 2/22/2022
NPANXX Area Served1 Date2
231-707 Newaygo 2/25/2016
231-709 Traverse City N/A
231-712 Muskegon N/A
231-714 Traverse City N/A
231-715 Traverse City N/A
231-719 Muskegon N/A
231-720 Muskegon N/A
231-721 Hart 8/27/2002
231-722 Muskegon N/A
231-723 Manistee N/A
231-724 Muskegon N/A
231-725 Muskegon N/A
231-726 Muskegon N/A
231-727 Muskegon N/A
231-728 Muskegon N/A
231-729 Irons 8/30/2002
231-730 Muskegon N/A
231-731 Shelby 10/12/2001
231-732 Morley N/A
231-733 Muskegon N/A
231-734 Evart N/A
231-735 Traverse City 6/18/2001
231-736 Muskegon N/A
231-737 Muskegon N/A
231-739 Muskegon N/A
231-740 Muskegon N/A
231-742 Hart N/A
231-743 Marion N/A
231-744 Muskegon N/A
231-745 Baldwin N/A
231-746 Cheboygan 2/18/2022
231-747 Muskegon N/A
231-750 Muskegon N/A
231-751 Walloon Lk 10/6/2014
231-753 Petoskey 6/18/2001
231-755 Muskegon N/A
231-757 Scottville N/A
231-758 Petoskey N/A
231-759 Muskegon N/A
231-760 Muskegon N/A
231-762 Amble N/A
231-763 Amble 4/19/2019
231-764 Fife Lake 8/31/2001
231-766 Muskegon N/A
231-767 Muskegon N/A
231-768 Le Roy N/A
231-769 Muskegon N/A
231-771 Elk Rapids 3/22/2016
231-772 Wellston 3/7/2022
231-773 Muskegon N/A
231-774 Interlochen 1/19/2005
231-775 Cadillac N/A
231-776 Petoskey 8/27/2002
231-777 Muskegon N/A
231-778 Traverse City 8/27/2002
231-779 Cadillac N/A
231-780 Muskegon N/A
231-782 Cheboygan 8/27/2002
231-786 Traverse City 3/24/2021
231-787 Whitecloud 11/7/2014
231-788 Muskegon N/A
231-790 Freesoil 6/18/2001
231-791 Reed City 5/18/2001
231-792 Mancelona 8/27/2002
231-793 Whitecloud 1/9/2001
231-794 Manistee 8/30/2002
231-796 Big Rapids N/A
231-797 Luther N/A
231-798 Muskegon N/A
231-799 Muskegon N/A
NPANXX Area Served1 Date2
231-800 Luther 10/2/2017
231-803 Morley 5/18/2001
231-805 Kaleva 1/19/2005
231-806 Coral 8/27/2002
231-808 Central Lake 8/12/2002
231-813 Ludington 2/8/2001
231-818 Cheboygan N/A
231-819 Tustin 10/6/2014
231-821 Holton N/A
231-822 Beulah 8/27/2001
231-823 Stanwood N/A
231-824 Manton N/A
231-825 Mcbain N/A
231-826 Falmouth N/A
231-828 Twin Lake N/A
231-829 Tustin N/A
231-830 Muskegon N/A
231-831 East Jordan 5/21/2021
231-832 Reed City N/A
231-833 Wolverine 4/11/2005
231-834 Grant N/A
231-835 Glen Lake 8/30/2002
231-836 Evart 8/27/2002
231-837 Fremont N/A
231-838 Petoskey 3/29/2002
231-839 Lake City N/A
231-842 Cadillac 8/27/2002
231-843 Ludington N/A
231-844 Indian River 6/18/2001
231-845 Ludington N/A
231-846 Cadillac N/A
231-848 Wellston N/A
231-852 Ludington N/A
231-853 Ravenna N/A
231-854 Hesperia N/A
231-855 Muskegon N/A
231-856 Morley N/A
231-859 Dublin N/A
231-861 Shelby N/A
231-862 Hoxeyville N/A
231-864 Bear Lake N/A
231-865 Fruitport N/A
231-866 Suttons Bay 8/30/2002
231-867 Chippewa Lake N/A
231-869 Pentwater N/A
231-871 Beulah N/A
231-872 Reed City N/A
231-873 Hart N/A
231-874 Wolverine 8/27/2002
231-875 Fruitport 7/6/2001
231-876 Cadillac N/A
231-877 Northport N/A
231-878 Cadillac 7/19/2002
231-879 Fife Lake N/A
231-880 Muskegon 9/8/2021
231-881 Petoskey N/A
231-882 Beulah N/A
231-883 Traverse City N/A
231-884 Cadillac N/A
231-885 Mesick N/A
231-886 Kalkaska N/A
231-887 Manistee N/A
231-888 Twin Lake 6/16/2015
231-889 Onekama N/A
231-890 Traverse City N/A
231-893 Whitehall N/A
231-894 Whitehall N/A
231-898 Carr N/A
231-899 Northport 8/27/2002
NPANXX Area Served1 Date2
231-900 Muskegon 5/13/2019
231-902 Hart 8/27/2001
231-903 Muskegon 4/29/2002
231-907 Ludington 9/3/2002
231-908 Mcbain 8/27/2002
231-912 Reed City 8/30/2002
231-916 Mancelona 6/18/2001
231-920 Cadillac N/A
231-922 Traverse City N/A
231-923 Hart 5/18/2001
231-924 Fremont N/A
231-925 Scottville 8/27/2002
231-928 Fremont N/A
231-929 Traverse City N/A
231-930 Beulah 6/18/2001
231-932 Traverse City N/A
231-933 Traverse City N/A
231-935 Traverse City N/A
231-936 Scottville 6/18/2001
231-937 Howard City N/A
231-938 Traverse City N/A
231-939 Petoskey 8/9/2017
231-941 Traverse City N/A
231-942 Cadillac 6/18/2001
231-943 Traverse City N/A
231-944 Traverse City N/A
231-946 Traverse City N/A
231-947 Traverse City N/A
231-955 Muskegon N/A
231-963 Mcbain 2/28/2022
231-966 Freesoil 2/22/2022
231-968 Cadillac 9/16/2021
231-970 Bear Lake 8/30/2002
231-972 Mecosta N/A
231-974 Grant 8/27/2002
231-977 Mackinaw City 2/19/2020
231-981 Whitehall N/A
231-994 Lake Leelanau 1/19/2005
231-995 Traverse City N/A
231-999 Central Lake 8/24/2015
  1. For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
  2. Assignment date. N/A - mostly central office codes assigned before 2001.
  3. NXX prefixes last updated: March 1st, 2025

Cities in area code 231

City1 County Time Zone2
Acme Grand Traverse E
Afton Cheboygan E
Alanson Emmet E
Alba Antrim E
Alden Antrim E
Arcadia Manistee E
Bailey Muskegon E
Baldwin Lake E
Bay Shore Charlevoix E
Bear Lake Manistee E
Beaver Island Charlevoix E
Bellaire Antrim E
Benzonia Benzie E
Beulah Benzie E
Big Rapids Mecosta E
Bitely Newaygo E
Boon Wexford E
Boyne City Charlevoix E
Boyne Falls Charlevoix E
Branch Mason E
Brethren Manistee E
Brohman Newaygo E
Brutus Emmet E
Buckley Wexford E
Burt Lake Cheboygan E
Cadillac Wexford E
Carp Lake Emmet E
Casnovia Muskegon E
Cedar Leelanau E
Central Lake Antrim E
Charlevoix Charlevoix E
Chase Lake E
Cheboygan Cheboygan E
Chippewa Lake Mecosta E
Conway Emmet E
Copemish Manistee E
Coral Montcalm E
Cross Village Emmet E
Custer Mason E
East Jordan Charlevoix E
Eastlake Manistee E
Eastport Antrim E
Elberta Benzie E
Elk Rapids Antrim E
Ellsworth Antrim E
Elmira Otsego E
Empire Leelanau E
Evart Osceola E
Falmouth Missaukee E
Fife Lake Kalkaska E
Filer City Manistee E
Fountain Mason E
Frankfort Benzie E
Free Soil Mason E
Fremont Newaygo E
Fruitport Muskegon E
Glen Arbor Leelanau E
Good Hart Emmet E
Gowen Kent E
Grant Newaygo E
Grawn Grand Traverse E
Greenville Montcalm E
Harbor Springs Emmet E
Harrietta Wexford E
Hart Oceana E
Hersey Osceola E
Hesperia Oceana E
Holton Muskegon E
Honor Benzie E
Howard City Montcalm E
Idlewild Lake E
Indian River Cheboygan E
Interlochen Grand Traverse E
Irons Lake E
Kaleva Manistee E
Kalkaska Kalkaska E
Kewadin Antrim E
Kingsley Grand Traverse E
Lake Ann Benzie E
Lake City Missaukee E
Lake Leelanau Leelanau E
Leland Leelanau E
Leroy Osceola E
Levering Emmet E
Ludington Mason E
Luther Lake E
Mackinaw City Cheboygan E
Mancelona Antrim E
Manistee Manistee E
Manton Wexford E
Maple City Leelanau E
Marion Osceola E
Mayfield Grand Traverse E
Mc Bain Missaukee E
Mears Oceana E
Mecosta Mecosta E
Merritt Missaukee E
Mesick Wexford E
Montague Muskegon E
Morley Mecosta E
Mullett Lake Cheboygan E
Muskegon Muskegon E
New Era Oceana E
Newaygo Newaygo E
Northport Leelanau E
Oden Emmet E
Old Mission Grand Traverse E
Omena Leelanau E
Onekama Manistee E
Paris Mecosta E
Pellston Emmet E
Pentwater Oceana E
Petoskey Emmet E
Pierson Montcalm E
Pointe Aux Pins Mackinac E
Rapid City Kalkaska E
Ravenna Muskegon E
Reed City Osceola E
Rodney Mecosta E
Rothbury Oceana E
Scottville Mason E
Sears Osceola E
Shelby Oceana E
South Boardman Kalkaska E
Stanwood Mecosta E
Suttons Bay Leelanau E
Sylvan Beach Muskegon E
Thompsonville Benzie E
Topinabee Cheboygan E
Traverse City Grand Traverse E
Trufant Montcalm E
Tustin Osceola E
Twin Lake Muskegon E
Walhalla Mason E
Walkerville Oceana E
Walloon Lake Charlevoix E
Wellston Manistee E
White Cloud Newaygo E
Whitehall Muskegon E
Williamsburg Grand Traverse E
Wolverine Cheboygan E
  1. Listed above are most places served by USA area code 231. When multiple places in a US state share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. E stands for Eastern Time (currently ).
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