Active Prefixes in Area Code 331

Prefix Location Company
331-200 Bartlett, IL T-mobile Usa
331-201 Downers Grove, IL Cellco Partnership DBA Verizon Wireless
331-202 Elmhurst, IL Sprint Spectrum L.p.
331-203 Aurora, IL Sprint Spectrum L.p.
331-204 Bartlett, IL Broadvox-clec
331-205 Aurora, IL T-mobile Usa
331-206 Aurora, IL Sprint Spectrum L.p.
331-207 Yorkville, IL Level 3 Communications
331-208 Aurora, IL Sprint Spectrum L.p.
331-209 Elmhurst, IL Level 3 Communications
331-210 Saint Charles, IL Peerless Network Of Illinois
331-212 Aurora, IL Mci Worldcom Communications
331-213 Naperville, IL Cellco Partnership DBA Verizon Wireless
331-214 Downers Grove, IL Cellco Partnership DBA Verizon Wireless
331-215 Naperville, IL Cellco Partnership DBA Verizon Wireless
331-216 Oswego, IL New Cingular Wireless PCS
331-218 Wheaton, IL T-mobile Usa
331-219 CHICAGO T-Mobile USA Inc
331-220 Aurora, IL Sprint Spectrum L.p.
331-222 Saint Charles, IL Cricket Communications
331-223 Saint Charles, IL Cricket Communications
331-225 Elmhurst, IL Sprint Spectrum L.p.
331-226 CHICAGO Comcast Phone of Illinois LLC - IL
331-227 CHICAGO T-Mobile USA Inc
331-228 Saint Charles, IL Ovation Communications Of Illinois
331-229 Naperville, IL Cellco Partnership DBA Verizon Wireless
331-230 CHICAGO T-Mobile USA Inc
331-231 CHICAGO New Cingular Wireless PCS LLC - IL
331-232 CHICAGO New Cingular Wireless PCS LLC - IL
331-233 CHICAGO TELNYX LLC
331-234 Sugar Grove, IL Cellco Partnership DBA Verizon Wireless
331-235 Illinois
331-236 CHICAGO T-Mobile USA Inc
331-237 Illinois
331-238 Illinois
331-239 Illinois
331-240 West Chicago, IL Peerless Network Of Illinois
331-241 Illinois
331-242 Illinois
331-243 Illinois
331-244 Illinois
331-245 Bartlett, IL T-mobile Usa
331-246 Illinois
331-247 Illinois
331-249 Illinois
331-250 Aurora, IL T-mobile Usa
331-251 Downers Grove, IL Cellco Partnership DBA Verizon Wireless
331-252 CHICAGO Teleport Communications America LLC - IL
331-253 CHICAGO Bandwidth.com CLEC LLC - IL
331-254 CHICAGO Cellco Partnership dba Verizon Wireless - IL
331-255 CHICAGO Neutral Tandem-Illinois LLC
331-256 Aurora, IL Cellco Partnership DBA Verizon Wireless
331-257 Illinois
331-258 Illinois
331-259 Illinois
331-260 Illinois
331-263 CHICAGO Neutral Tandem-Illinois LLC - IL
331-276 CHICAGO Bandwidth.com CLEC LLC - IL
331-281 Naperville, IL Ameritech Illinois
331-300 CHICAGO Comcast Phone of Illinois LLC - IL
331-301 Aurora, IL Local Access LLC
331-302 Aurora, IL Cellco Partnership DBA Verizon Wireless
331-303 Elburn, IL Cibolo Creek Ventures DBA Routepoint Comm Il
331-304 CHICAGO T-Mobile USA Inc
331-305 Naperville, IL Cellco Partnership DBA Verizon Wireless
331-307 CHICAGO Neutral Tandem-Illinois LLC
331-308 CHICAGO Bandwidth.com CLEC LLC - IL
331-310 CHICAGO Broadvox-CLEC LLC - IL
331-315 CHICAGO Level 3 Telecom of Illinois LLC - IL
331-318 Lemont, IL Local Access LLC
331-321 CHICAGO MCI Worldcom Communications Inc - IL
331-330 Oswego, IL Cricket Communications
331-332 Naperville, IL Cricket Communications
331-333 Naperville, IL Cricket Communications
331-385 CHICAGO T-Mobile USA Inc
331-401 CHICAGO Cellco Partnership dba Verizon Wireless - IL
331-422 Saint Charles, IL Level 3 Communications
331-425 Aurora, IL T-mobile Usa
331-431 Aurora, IL Bandwidth.com Clec
331-442 Saint Charles, IL Cellco Partnership DBA Verizon Wireless
331-452 Aurora, IL Cellco Partnership DBA Verizon Wireless
331-454 Aurora, IL Cricket Communications
331-456 Roselle, IL First Communications LLC
331-457 Naperville, IL Cellco Partnership DBA Verizon Wireless
331-462 Lombard, IL Xo Illinois
331-472 Naperville, IL T-mobile Usa
331-481 Downers Grove, IL Cellco Partnership DBA Verizon Wireless
331-551 Lombard, IL Cricket Communications
331-625 Downers Grove, IL Cellco Partnership DBA Verizon Wireless
331-642 Elmhurst, IL Bandwidth.com Clec
331-645 Elmhurst, IL Sprint Spectrum L.p.
331-666 Illinois
331-684 Aurora, IL Sigecom
331-701 CHICAGO Neutral Tandem-Illinois LLC
331-702 Naperville, IL Mci Worldcom Communications
331-703 West Chicago, IL T-mobile Usa
331-704 CHICAGO Broadvox-CLEC LLC - IL
331-707 CHICAGO New Cingular Wireless PCS LLC - IL
331-716 CHICAGO Broadvox-CLEC LLC - IL
331-717 CHICAGO Metro FiberNet LLC - IL
331-725 Oswego, IL New Cingular Wireless PCS
331-757 CHICAGO Teleport Communications America LLC - IL
331-771 CHICAGO Cellco Partnership dba Verizon Wireless - IL
331-775 CHICAGO Comcast Phone of Illinois LLC - IL
331-777 Downers Grove, IL Cellco Partnership DBA Verizon Wireless
331-800 Illinois
331-801 CHICAGO Teleport Communications America LLC - IL
331-803 Lemont, IL Peerless Network Of Illinois
331-806 CHICAGO Neutral Tandem-Illinois LLC
331-808 CHICAGO Neutral Tandem-Illinois LLC
331-814 CHICAGO Level 3 Communications LLC - IL
331-825 Chicago Digital Network Access Communi
331-826 Elmhurst, IL Sprint Spectrum L.p.
331-871 CHICAGO New Cingular Wireless PCS LLC - IL
331-888 Warrenville, IL Peerless Network Of Illinois
331-901 CHICAGO New Cingular Wireless PCS LLC - IL
331-903 CHICAGO New Cingular Wireless PCS LLC - IL
331-958 Chicago Illinois Bell Tel Co
331-959 Chicago Illinois Bell Tel Co
331-979 CHICAGO Comcast Phone of Illinois LLC - IL
331-980 CHICAGO T-Mobile USA Inc
331-998 CHICAGO Comcast Phone of Illinois LLC - IL
331-999 Oswego, IL Bandwidth.com Clec