There are 209 phone number prefixes within area code 331. Additionally, there are more than 1,400 phone numbers in this area code that have received at least one user report. The location of calls from area code 331 is Illinois, USA. Most numbers in this area code are in US Central time, where the time is currently 3:26:16 AM on April 30, 2025.
Choose a phone number from the list below to browse user reports for . You can also use the search box above to search for user reports about any phone number, or to file a report about any phone number.
| Prefix | City / State | Primary Telco |
|---|---|---|
| 331-200 | Bartlett, IL | T-mobile Usa, Inc. |
| 331-201 | Downers Grove, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-202 | Elmhurst, IL | Sprint Spectrum, L.p. |
| 331-203 | Aurora, IL | Sprint Spectrum, L.p. |
| 331-204 | Naperville, IL | Onvoy, Llc |
| 331-205 | Aurora, IL | T-mobile Usa, Inc. |
| 331-206 | Aurora, IL | Sprint Spectrum, L.p. |
| 331-207 | Yorkville, IL | Level 3 Communications, Llc - Il |
| 331-208 | Aurora, IL | Sprint Spectrum, L.p. |
| 331-209 | Elmhurst, IL | Level 3 Communications, Llc - Il |
| 331-210 | St Charles, IL | Peerless Network Of Illinois, Llc - Il |
| 331-211 | Illinois | |
| 331-212 | Aurora, IL | Mcimetro Access Transmission Services Llc - Il |
| 331-213 | Naperville, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-214 | Downers Grove, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-215 | Naperville, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-216 | Oswego, IL | New Cingular Wireless Pcs, Llc - Il |
| 331-217 | Illinois | |
| 331-218 | Wheaton, IL | T-mobile Usa, Inc. |
| 331-219 | Aurora, IL | Telnyx Llc |
| 331-220 | Aurora, IL | Sprint Spectrum, L.p. |
| 331-221 | Elmhurst, IL | Illinois Bell Tel Co |
| 331-222 | St Charles, IL | New Cingular Wireless Pcs, Llc - Il |
| 331-223 | St Charles, IL | New Cingular Wireless Pcs, Llc - Il |
| 331-224 | Illinois | |
| 331-225 | Elmhurst, IL | Sprint Spectrum, L.p. |
| 331-226 | Naperville, IL | T-mobile Usa, Inc. |
| 331-227 | Sugar Grove, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-228 | St Charles, IL | Ovation Communications Of Illinois, Inc. |
| 331-229 | Naperville, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-230 | Aurora, IL | T-mobile Usa, Inc. |
| 331-231 | Naperville, IL | New Cingular Wireless Pcs, Llc - Il |
| 331-232 | West Chicago, IL | New Cingular Wireless Pcs, Llc - Il |
| 331-233 | Downers Grove, IL | Telnyx Llc |
| 331-234 | Sugar Grove, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-235 | St Charles, IL | New Cingular Wireless Pcs, Llc - Il |
| 331-236 | Wheaton, IL | T-mobile Usa, Inc. |
| 331-237 | Naperville, IL | Mcimetro Access Transmission Services Llc - Il |
| 331-238 | Downers Grove, IL | Teleport Communications America, Llc - Il |
| 331-239 | Yorkville, IL | Onvoy, Llc |
| 331-240 | West Chicago, IL | Peerless Network Of Illinois, Llc - Il |
| 331-241 | Lombard, IL | Intrado Communications, Llc |
| 331-242 | Lombard, IL | T-mobile Usa, Inc. |
| 331-243 | Lombard, IL | T-mobile Usa, Inc. |
| 331-244 | Naperville, IL | Onvoy, Llc |
| 331-245 | Bartlett, IL | T-mobile Usa, Inc. |
| 331-246 | Lemont, IL | T-mobile Usa, Inc. |
| 331-247 | Naperville, IL | Vonage America Llc |
| 331-248 | Geneva, IL | Comcast Ip Phone, Llc |
| 331-249 | Naperville, IL | Onvoy, Llc |
| 331-250 | Aurora, IL | T-mobile Usa, Inc. |
| 331-251 | Downers Grove, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-252 | Warrenville, IL | Teleport Communications America, Llc - Il |
| 331-253 | Lemont, IL | T-mobile Usa, Inc. |
| 331-254 | Sugar Grove, IL | T-mobile Usa, Inc. |
| 331-255 | Aurora, IL | Onvoy, Llc |
| 331-256 | Aurora, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-257 | Aurora, IL | New Cingular Wireless Pcs, Llc - Il |
| 331-258 | Aurora, IL | Onvoy, Llc |
| 331-259 | Sugar Grove, IL | Peerless Network Of Illinois, Llc - Il |
| 331-260 | Downers Grove, IL | Teleport Communications America, Llc - Il |
| 331-261 | Lemont, IL | T-mobile Usa, Inc. |
| 331-262 | Aurora, IL | Sprint Spectrum, L.p. |
| 331-263 | Itasca, IL | Onvoy, Llc |
| 331-264 | Hinsdale, IL | Level 3 Communications, Llc - Il |
| 331-265 | Geneva, IL | Onvoy, Llc |
| 331-266 | St Charles, IL | New Cingular Wireless Pcs, Llc - Il |
| 331-267 | Lombard, IL | Vonage America Llc |
| 331-268 | Sugar Grove, IL | T-mobile Usa, Inc. |
| 331-269 | Aurora, IL | T-mobile Usa, Inc. |
| 331-270 | Aurora, IL | Onvoy, Llc |
| 331-271 | Hinsdale, IL | Onvoy, Llc |
| 331-272 | St Charles, IL | Onvoy, Llc |
| 331-273 | Lemont, IL | Onvoy, Llc |
| 331-274 | Aurora, IL | T-mobile Usa, Inc. |
| 331-275 | Bartlett, IL | T-mobile Usa, Inc. |
| 331-276 | St Charles, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-277 | Lombard, IL | New Cingular Wireless Pcs, Llc - Il |
| 331-278 | Aurora, IL | New Cingular Wireless Pcs, Llc - Il |
| 331-279 | Elmhurst, IL | Paetec Communications, Inc. - Il |
| 331-280 | Downers Grove, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-281 | Naperville, IL | Illinois Bell Tel Co |
| 331-282 | Hinsdale, IL | Onvoy, Llc |
| 331-283 | Geneva, IL | T-mobile Usa, Inc. |
| 331-284 | Bartlett, IL | T-mobile Usa, Inc. |
| 331-285 | Naperville, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-288 | Elburn, IL | Ton80 Communications, Llc |
| 331-299 | Hinsdale, IL | Fractel, Llc |
| 331-300 | Aurora, IL | T-mobile Usa, Inc. |
| 331-301 | Aurora, IL | Local Access Llc - Il |
| 331-302 | Aurora, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-303 | Elburn, IL | Bandwidth.com Clec, Llc - Il |
| 331-304 | Bartlett, IL | T-mobile Usa, Inc. |
| 331-305 | Naperville, IL | Cellco Partnership Dba Verizon Wireless - Il |
| 331-307 | Lombard, IL | T-mobile Usa, Inc. |
| 331-308 | Bartlett, IL | Bandwidth.com Clec, Llc - Il |
| 331-309 | Illinois | |
| 331-310 | Big Rock, IL | Bandwidth.com Clec, Llc - Il |
| 331-311 | Illinois | |
| 331-312 | Illinois |
April 28, 2025