Area Code 331

Area code 331 serves the state of Illinois. This area code was assigned on July 23rd, 1999. On October 7th, 2007 it went into service. 331 is a General Purpose Code. 331 service area does overlap with 630 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

Area Code 331 Prefixes

Prefix Location Usage Company
331-200 Bartlett, IL Wireless T-mobile Usa, Inc.
331-201 Downers Grove, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-202 Elmhurst, IL Wireless Sprint Spectrum L.p.
331-203 Aurora, IL Wireless Sprint Spectrum L.p.
331-204 Naperville, IL Landline Neutral Tandem-illinois, Llc - Il
331-205 Aurora, IL Wireless T-mobile Usa, Inc.
331-206 Aurora, IL Wireless Sprint Spectrum L.p.
331-207 Yorkville, IL Landline Level 3 Communications, Llc - Il
331-208 Aurora, IL Wireless Sprint Spectrum L.p.
331-209 Elmhurst, IL Wireless Level 3 Communications, Llc - Il
331-212 Aurora, IL Landline Mci Worldcom Communications, Inc. - Il
331-213 Naperville, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-214 Downers Grove, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-215 Naperville, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-216 Oswego, IL Wireless New Cingular Wireless Pcs, Llc - Il
331-218 Wheaton, IL Wireless T-mobile Usa, Inc.
331-219 Aurora, IL Landline Telnyx Llc
331-220 Aurora, IL Wireless Sprint Spectrum L.p.
331-221 Elmhurst, IL Landline Ameritech Illinois
331-225 Elmhurst, IL Wireless Sprint Spectrum L.p.
331-226 Naperville, IL Wireless T-mobile Usa, Inc.
331-227 Sugar Grove, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-229 Naperville, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-230 Aurora, IL Wireless T-mobile Usa, Inc.
331-233 Downers Grove, IL Landline Telnyx Llc
331-234 Sugar Grove, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-236 Wheaton, IL Wireless T-mobile Usa, Inc.
331-240 West Chicago, IL Landline Peerless Network Of Illinois, Llc - Il
331-245 Bartlett, IL Wireless T-mobile Usa, Inc.
331-248 Geneva, IL Landline Comcast Phone Of Illinois, Llc Dba Comco - Il
331-250 Aurora, IL Wireless T-mobile Usa, Inc.
331-251 Downers Grove, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-252 Warrenville, IL Landline Teleport Communications America, Llc - Il
331-253 Lemont, IL Wireless T-mobile Usa, Inc.
331-254 Sugar Grove, IL Wireless T-mobile Usa, Inc.
331-256 Aurora, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-262 Aurora, IL Wireless Sprint Spectrum L.p.
331-263 Itasca, IL Landline Neutral Tandem-illinois, Llc - Il
331-281 Naperville, IL Landline Ameritech Illinois
331-300 Aurora, IL Wireless T-mobile Usa, Inc.
331-301 Aurora, IL Landline Local Access Llc - Il
331-302 Aurora, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-303 Elburn, IL Landline Cibolo Creek Ventures, Llc Dba Routepoint Comm Il
331-304 Bartlett, IL Wireless T-mobile Usa, Inc.
331-305 Naperville, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-307 Lombard, IL Wireless T-mobile Usa, Inc.
331-308 Bartlett, IL Landline Bandwidth.com Clec, Llc - Il
331-310 Big Rock, IL Landline Bandwidth.com Clec, Llc - Il
331-315 Lombard, IL Wireless New Cingular Wireless Pcs, Llc - Il
331-318 Lemont, IL Landline Local Access Llc - Il
331-321 Aurora, IL Wireless T-mobile Usa, Inc.
331-330 Naperville, IL Landline New Cingular Wireless Pcs, Llc - Il
331-332 Naperville, IL Wireless New Cingular Wireless Pcs, Llc - Il
331-333 Naperville, IL Wireless New Cingular Wireless Pcs, Llc - Il
331-385 Aurora, IL Wireless New Cingular Wireless Pcs, Llc - Il
331-401 Naperville, IL Landline Level 3 Communications, Llc - Il
331-425 Aurora, IL Wireless T-mobile Usa, Inc.
331-431 Aurora, IL Wireless Bandwidth.com Clec, Llc - Il
331-444 Naperville, IL Landline Cellco Partnership Dba Verizon Wireless - Il
331-452 Aurora, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-454 Aurora, IL Wireless New Cingular Wireless Pcs, Llc - Il
331-456 Roselle, IL Landline First Communications Llc - Il
331-457 Naperville, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-462 Lombard, IL Landline Xo Illinois, Inc.
331-465 West Chicago, IL Wireless New Cingular Wireless Pcs, Llc - Il
331-472 Naperville, IL Wireless T-mobile Usa, Inc.
331-481 Downers Grove, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-551 Lombard, IL Wireless New Cingular Wireless Pcs, Llc - Il
331-575 Aurora, IL Wireless Sprint Spectrum L.p.
331-625 Downers Grove, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-642 Elmhurst, IL Wireless Bandwidth.com Clec, Llc - Il
331-643 Aurora, IL Wireless Sprint Spectrum L.p.
331-645 Elmhurst, IL Wireless Sprint Spectrum L.p.
331-684 Aurora, IL Landline Sigecom, Llc Dba Wow Internet Cable And Phone
331-701 Naperville, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-702 Naperville, IL Landline Mci Worldcom Communications, Inc. - Il
331-703 West Chicago, IL Wireless T-mobile Usa, Inc.
331-704 Kaneville, IL Landline Bandwidth.com Clec, Llc - Il
331-707 Aurora, IL Wireless T-mobile Usa, Inc.
331-716 Wheaton, IL Landline Broadvox-clec, Llc - Il
331-717 Oswego, IL Wireless New Cingular Wireless Pcs, Llc - Il
331-725 Oswego, IL Landline New Cingular Wireless Pcs, Llc - Il
331-757 Lemont, IL Wireless T-mobile Usa, Inc.
331-775 Downers Grove, IL Landline Comcast Phone Of Illinois, Llc Dba Comco - Il
331-777 Downers Grove, IL Landline Cellco Partnership Dba Verizon Wireless - Il
331-801 Downers Grove, IL Landline Teleport Communications America, Llc - Il
331-803 Lemont, IL Landline Peerless Network Of Illinois, Llc - Il
331-806 Wheaton, IL Landline Comcast Phone Of Illinois, Llc Dba Comco - Il
331-808 Plano, IL Landline Bandwidth.com Clec, Llc - Il
331-814 Naperville, IL Wireless T-mobile Usa, Inc.
331-825 Geneva, IL Digital Network Access Communications, Inc. - Il
331-826 Elmhurst, IL Wireless Sprint Spectrum L.p.
331-871 West Chicago, IL Landline Neutral Tandem-illinois, Llc - Il
331-888 Warrenville, IL Landline Peerless Network Of Illinois, Llc - Il
331-903 Downers Grove, IL Landline At&t Corp.
331-979 Elmhurst, IL Landline Comcast Phone Of Illinois, Llc Dba Comco - Il
331-980 Aurora, IL Wireless T-mobile Usa, Inc.
331-998 Downers Grove, IL Wireless Cellco Partnership Dba Verizon Wireless - Il
331-999 Oswego, IL Landline Bandwidth.com Clec, Llc - Il