Prefixes with phone numbers reported to the Federal Trade Commission and Federal Communications Commission
| Prefix | Phone Numbers | Last Complaint |
|---|---|---|
| 331-301 | 44 | April 6, 2019 |
| 331-200 | 106 | April 5, 2019 |
| 331-330 | 13 | April 5, 2019 |
| 331-254 | 12 | April 5, 2019 |
| 331-216 | 7 | April 5, 2019 |
| 331-481 | 33 | April 5, 2019 |
| 331-255 | 19 | April 5, 2019 |
| 331-472 | 8 | April 4, 2019 |
| 331-684 | 20 | April 4, 2019 |
| 331-212 | 48 | April 4, 2019 |
| 331-234 | 8 | April 3, 2019 |
| 331-642 | 3 | April 3, 2019 |
| 331-215 | 23 | April 3, 2019 |
| 331-307 | 21 | April 3, 2019 |
| 331-808 | 3 | April 2, 2019 |
| 331-871 | 11 | April 2, 2019 |
| 331-208 | 29 | April 1, 2019 |
| 331-643 | 7 | April 1, 2019 |
| 331-425 | 25 | April 1, 2019 |
| 331-625 | 11 | March 31, 2019 |
| 331-256 | 40 | March 30, 2019 |
| 331-444 | 8 | March 30, 2019 |
| 331-210 | 19 | March 29, 2019 |
| 331-901 | 2 | March 29, 2019 |
| 331-248 | 13 | March 29, 2019 |
| 331-999 | 7 | March 28, 2019 |
| 331-204 | 106 | March 28, 2019 |
| 331-666 | 6 | March 28, 2019 |
| 331-244 | 46 | March 28, 2019 |
| 331-207 | 57 | March 27, 2019 |
| 331-214 | 7 | March 27, 2019 |
| 331-202 | 4 | March 27, 2019 |
| 331-262 | 10 | March 26, 2019 |
| 331-321 | 25 | March 25, 2019 |
| 331-888 | 4 | March 23, 2019 |
| 331-333 | 13 | March 22, 2019 |
| 331-725 | 20 | March 21, 2019 |
| 331-252 | 3 | March 18, 2019 |
| 331-575 | 5 | March 18, 2019 |
| 331-240 | 12 | March 17, 2019 |
| 331-251 | 4 | March 17, 2019 |
| 331-308 | 7 | March 15, 2019 |
| 331-253 | 14 | March 15, 2019 |
| 331-431 | 17 | March 15, 2019 |
| 331-302 | 4 | March 14, 2019 |
| 331-998 | 9 | March 14, 2019 |
| 331-219 | 16 | March 13, 2019 |
| 331-903 | 5 | March 13, 2019 |
| 331-703 | 11 | March 12, 2019 |
| 331-385 | 3 | March 11, 2019 |
| 331-976 | 1 | March 11, 2019 |
| 331-803 | 16 | March 9, 2019 |
| 331-233 | 14 | March 8, 2019 |
| 331-806 | 1 | March 6, 2019 |
| 331-716 | 13 | March 6, 2019 |
| 331-227 | 5 | March 5, 2019 |
| 331-310 | 21 | March 5, 2019 |
| 331-203 | 2 | February 28, 2019 |
| 331-462 | 10 | February 28, 2019 |
| 331-711 | 1 | February 27, 2019 |
| 331-701 | 18 | February 25, 2019 |
| 331-239 | 4 | February 25, 2019 |
| 331-980 | 3 | February 22, 2019 |
| 331-222 | 10 | February 21, 2019 |
| 331-318 | 2 | February 18, 2019 |
| 331-645 | 10 | February 18, 2019 |
| 331-223 | 8 | February 14, 2019 |
| 331-618 | 1 | February 14, 2019 |
| 331-456 | 3 | February 14, 2019 |
| 331-775 | 6 | February 14, 2019 |
| 331-979 | 17 | February 8, 2019 |
| 331-228 | 2 | January 28, 2019 |
| 331-205 | 15 | December 20, 2018 |
| 331-704 | 5 | December 18, 2018 |
| 331-224 | 2 | December 18, 2018 |
| 331-717 | 5 | December 17, 2018 |
| 331-225 | 4 | November 30, 2018 |
| 331-300 | 16 | November 28, 2018 |
| 331-247 | 1 | November 19, 2018 |
| 331-231 | 3 | November 16, 2018 |
| 331-771 | 11 | November 9, 2018 |
| 331-454 | 3 | November 2, 2018 |
| 331-237 | 1 | November 1, 2018 |
| 331-707 | 1 | November 1, 2018 |
| 331-757 | 3 | October 30, 2018 |
| 331-206 | 2 | October 23, 2018 |
| 331-209 | 11 | October 9, 2018 |
| 331-305 | 11 | October 9, 2018 |
| 331-281 | 8 | October 4, 2018 |
| 331-218 | 4 | October 3, 2018 |
| 331-303 | 5 | October 3, 2018 |
| 331-332 | 1 | October 2, 2018 |
| 331-551 | 4 | October 2, 2018 |
| 331-245 | 4 | September 27, 2018 |
| 331-304 | 2 | September 25, 2018 |
| 331-800 | 2 | September 7, 2018 |
| 331-201 | 3 | September 6, 2018 |
| 331-220 | 5 | August 28, 2018 |
| 331-221 | 2 | August 9, 2018 |
| 331-452 | 3 | August 2, 2018 |
| Type: General Purpose Code |
| Use: Geograpic |
| Location: ILLINOIS |
| Country: UNITED STATES |
| Service Date: 2007-10-07 |
| Service: - |
Other area codes serving ILLINOIS, UNITED STATES