Area code 331

Area code 331 is found in the US state of Illinois. Area code 331, overlain with 630, serves portions of Chicago’s near and far western suburbs. 10-digit dialing is required in these areas. Phone numbers in the 331 area code can be found in 20 cities or locations.

List of cities in area code 331

The carriers providing phone numbers in area code 331

Phone prefixes in the 331 area code

AreaCode/Prefix (Exchange) Usage
331-200 Cell
331-201 Cell
331-202 Cell
331-203 Cell
331-204 Landline
331-205 Cell
331-206 Cell
331-207 Landline
331-208 Cell
331-209 Cell
331-212 Landline
331-213 Cell
331-214 Cell
331-215 Cell
331-216 Cell
331-218 Landline
331-219 Unknown
331-220 Cell
331-221 Landline
331-225 Cell
331-226 Unknown
331-227 Unknown
331-229 Cell
331-230 Unknown
331-233 Unknown
331-234 Landline
331-236 Unknown
331-240 Landline
331-245 Cell
331-248 Landline
331-250 Cell
331-251 Cell
331-252 Unknown
331-253 Unknown
331-254 Landline
331-256 Cell
331-262 Cell
331-263 Unknown
331-281 Landline
331-300 Unknown
331-301 Landline
331-302 Cell
331-303 Landline
331-304 Unknown
331-305 Landline
331-307 Unknown
331-308 Unknown
331-310 Unknown
331-315 Unknown
331-318 Landline
331-321 Unknown
331-330 Landline
331-332 Cell
331-333 Cell
331-385 Unknown
331-401 Unknown
331-425 Cell
331-431 Cell
331-444 Landline
331-452 Cell
331-454 Cell
331-456 Landline
331-457 Cell
331-462 Landline
331-465 Cell
331-472 Cell
331-481 Cell
331-551 Cell
331-575 Cell
331-625 Cell
331-642 Cell
331-643 Cell
331-645 Cell
331-684 Landline
331-701 Unknown
331-702 Landline
331-703 Landline
331-704 Unknown
331-707 Unknown
331-716 Unknown
331-717 Unknown
331-725 Landline
331-757 Unknown
331-775 Unknown
331-777 Landline
331-801 Landline
331-803 Landline
331-806 Unknown
331-808 Unknown
331-814 Unknown
331-825 Landlines
331-826 Cell
331-871 Unknown
331-888 Landline
331-903 Landline
331-979 Unknown
331-980 Unknown
331-998 Unknown
331-999 Landline