Area Code 331

Area code 331, overlain with 630, serves portions of Chicago’s near and far western suburbs. 10-digit dialing is required in these areas.

Prefix City/State Phone Type Company
331-200 Bartlett, IL Cell T-mobile Usa
331-201 Downers Grove, IL Cell Cellco Partnership DBA Verizon Wireless
331-202 Elmhurst, IL Cell Sprint Spectrum L.p.
331-203 Aurora, IL Cell Sprint Spectrum L.p.
331-204 Aurora, IL Landline Unknown
331-205 Aurora, IL Cell T-mobile Usa
331-206 Aurora, IL Cell Sprint Spectrum L.p.
331-207 Yorkville, IL Landline Level 3 Communications
331-208 Aurora, IL Cell Sprint Spectrum L.p.
331-209 Elmhurst, IL Cell Level 3 Communications
331-212 Aurora, IL Landline Mci Worldcom Communications
331-213 Naperville, IL Cell Cellco Partnership DBA Verizon Wireless
331-214 Downers Grove, IL Cell Cellco Partnership DBA Verizon Wireless
331-215 Naperville, IL Cell Cellco Partnership DBA Verizon Wireless
331-216 Oswego, IL Cell New Cingular Wireless PCS
331-218 Aurora, IL Landline Unknown
331-220 Aurora, IL Cell Sprint Spectrum L.p.
331-221 Elmhurst, IL Landline Ameritech Illinois
331-225 Elmhurst, IL Cell Sprint Spectrum L.p.
331-229 Naperville, IL Cell Cellco Partnership DBA Verizon Wireless
331-234 Aurora, IL Landline Unknown
331-240 West Chicago, IL Landline Peerless Network Of Illinois
331-245 Bartlett, IL Cell T-mobile Usa
331-248 Geneva, IL Landline Comcast Phone Of Illinois DBA Comco
331-250 Aurora, IL Cell T-mobile Usa
331-251 Downers Grove, IL Cell Cellco Partnership DBA Verizon Wireless
331-254 Aurora, IL Landline Unknown
331-256 Aurora, IL Cell Cellco Partnership DBA Verizon Wireless
331-262 Aurora, IL Cell Sprint Spectrum L.p.
331-281 Naperville, IL Landline Ameritech Illinois
331-301 Aurora, IL Landline Local Access LLC
331-302 Aurora, IL Cell Cellco Partnership DBA Verizon Wireless
331-303 Elburn, IL Landline Cibolo Creek Ventures DBA Routepoint Comm Il
331-305 Aurora, IL Landline Unknown
331-318 Aurora, IL Landline Unknown
331-330 Oswego, IL Landline Cricket Communications
331-332 Naperville, IL Cell Cricket Communications
331-333 Naperville, IL Cell Cricket Communications
331-425 Aurora, IL Cell T-mobile Usa
331-431 Aurora, IL Cell Bandwidth.com Clec
331-444 Naperville, IL Landline Cellco Partnership DBA Verizon Wireless
331-452 Aurora, IL Cell Cellco Partnership DBA Verizon Wireless
331-454 Aurora, IL Cell Cricket Communications
331-456 Roselle, IL Landline First Communications LLC
331-457 Naperville, IL Cell Cellco Partnership DBA Verizon Wireless
331-462 Lombard, IL Landline Xo Illinois
331-465 West Chicago, IL Cell New Cingular Wireless PCS
331-472 Naperville, IL Cell T-mobile Usa
331-481 Downers Grove, IL Cell Cellco Partnership DBA Verizon Wireless
331-551 Lombard, IL Cell Cricket Communications
331-575 Aurora, IL Cell Sprint Spectrum L.p.
331-625 Downers Grove, IL Cell Cellco Partnership DBA Verizon Wireless
331-642 Elmhurst, IL Cell Bandwidth.com Clec
331-643 Aurora, IL Cell Sprint Spectrum L.p.
331-645 Elmhurst, IL Cell Sprint Spectrum L.p.
331-684 Aurora, IL Landline Sigecom
331-702 Aurora, IL Landline Unknown
331-703 Aurora, IL Landline Unknown
331-725 Oswego, IL Landline New Cingular Wireless PCS
331-777 Downers Grove, IL Landline Cellco Partnership DBA Verizon Wireless
331-801 Aurora, IL Landline Unknown
331-803 Lemont, IL Landline Peerless Network Of Illinois
331-825 Chicago Landlines Digital Network Access Communications
331-826 Elmhurst, IL Cell Sprint Spectrum L.p.
331-888 Warrenville, IL Landline Peerless Network Of Illinois
331-903 Aurora, IL Landline Unknown
331-999 Oswego, IL Landline Bandwidth.com Clec