Prefixes with phone numbers reported to the Federal Trade Commission and Federal Communications Commission
| Prefix | Phone Numbers | Last Complaint |
|---|---|---|
| 231-209 | 43 | April 7, 2019 |
| 231-888 | 19 | April 6, 2019 |
| 231-408 | 53 | April 6, 2019 |
| 231-246 | 40 | April 6, 2019 |
| 231-832 | 37 | April 6, 2019 |
| 231-383 | 43 | April 6, 2019 |
| 231-629 | 49 | April 6, 2019 |
| 231-331 | 63 | April 6, 2019 |
| 231-225 | 34 | April 5, 2019 |
| 231-403 | 39 | April 5, 2019 |
| 231-714 | 17 | April 5, 2019 |
| 231-360 | 48 | April 5, 2019 |
| 231-570 | 29 | April 5, 2019 |
| 231-422 | 24 | April 5, 2019 |
| 231-492 | 13 | April 5, 2019 |
| 231-216 | 228 | April 5, 2019 |
| 231-587 | 14 | April 5, 2019 |
| 231-412 | 38 | April 5, 2019 |
| 231-409 | 48 | April 5, 2019 |
| 231-510 | 24 | April 5, 2019 |
| 231-824 | 8 | April 5, 2019 |
| 231-666 | 41 | April 5, 2019 |
| 231-440 | 30 | April 5, 2019 |
| 231-861 | 12 | April 5, 2019 |
| 231-389 | 10 | April 5, 2019 |
| 231-357 | 36 | April 5, 2019 |
| 231-876 | 8 | April 5, 2019 |
| 231-750 | 21 | April 5, 2019 |
| 231-354 | 23 | April 5, 2019 |
| 231-427 | 9 | April 5, 2019 |
| 231-266 | 20 | April 5, 2019 |
| 231-333 | 19 | April 5, 2019 |
| 231-941 | 11 | April 5, 2019 |
| 231-958 | 5 | April 5, 2019 |
| 231-805 | 3 | April 4, 2019 |
| 231-838 | 43 | April 4, 2019 |
| 231-450 | 12 | April 4, 2019 |
| 231-649 | 26 | April 4, 2019 |
| 231-224 | 23 | April 4, 2019 |
| 231-244 | 230 | April 4, 2019 |
| 231-582 | 13 | April 4, 2019 |
| 231-338 | 31 | April 4, 2019 |
| 231-460 | 16 | April 4, 2019 |
| 231-947 | 15 | April 4, 2019 |
| 231-745 | 12 | April 4, 2019 |
| 231-675 | 48 | April 4, 2019 |
| 231-335 | 18 | April 4, 2019 |
| 231-525 | 45 | April 4, 2019 |
| 231-821 | 10 | April 4, 2019 |
| 231-255 | 6 | April 4, 2019 |
| 231-366 | 23 | April 4, 2019 |
| 231-879 | 5 | April 4, 2019 |
| 231-220 | 41 | April 4, 2019 |
| 231-944 | 16 | April 4, 2019 |
| 231-766 | 15 | April 4, 2019 |
| 231-719 | 15 | April 4, 2019 |
| 231-912 | 5 | April 4, 2019 |
| 231-845 | 12 | April 4, 2019 |
| 231-744 | 27 | April 4, 2019 |
| 231-464 | 6 | April 4, 2019 |
| 231-538 | 17 | April 4, 2019 |
| 231-251 | 117 | April 3, 2019 |
| 231-955 | 46 | April 3, 2019 |
| 231-632 | 32 | April 3, 2019 |
| 231-930 | 26 | April 3, 2019 |
| 231-260 | 5 | April 3, 2019 |
| 231-737 | 7 | April 3, 2019 |
| 231-384 | 28 | April 3, 2019 |
| 231-646 | 4 | April 3, 2019 |
| 231-577 | 30 | April 3, 2019 |
| 231-670 | 63 | April 3, 2019 |
| 231-421 | 15 | April 3, 2019 |
| 231-733 | 12 | April 3, 2019 |
| 231-292 | 47 | April 3, 2019 |
| 231-276 | 17 | April 3, 2019 |
| 231-922 | 12 | April 3, 2019 |
| 231-596 | 10 | April 3, 2019 |
| 231-205 | 7 | April 3, 2019 |
| 231-441 | 4 | April 2, 2019 |
| 231-264 | 12 | April 2, 2019 |
| 231-308 | 5 | April 2, 2019 |
| 231-894 | 12 | April 2, 2019 |
| 231-247 | 11 | April 2, 2019 |
| 231-843 | 20 | April 2, 2019 |
| 231-672 | 7 | April 2, 2019 |
| 231-715 | 23 | April 2, 2019 |
| 231-571 | 17 | April 2, 2019 |
| 231-518 | 4 | April 2, 2019 |
| 231-779 | 12 | April 2, 2019 |
| 231-243 | 13 | April 2, 2019 |
| 231-588 | 4 | April 1, 2019 |
| 231-597 | 17 | April 1, 2019 |
| 231-994 | 4 | April 1, 2019 |
| 231-777 | 22 | April 1, 2019 |
| 231-923 | 9 | April 1, 2019 |
| 231-268 | 19 | April 1, 2019 |
| 231-822 | 1 | April 1, 2019 |
| 231-937 | 10 | April 1, 2019 |
| 231-350 | 44 | March 30, 2019 |
| 231-709 | 23 | March 29, 2019 |
| Type: General Purpose Code |
| Use: Geograpic |
| Location: MICHIGAN |
| Country: UNITED STATES |
| Service Date: 1999-06-05 |
| Service: - |
Other area codes serving MICHIGAN, UNITED STATES