Area code 773 covers part of Illinoisstate, covering most of Cook counties. It was started on Jan 01, 2000. This region follows US/Central + Daylight Savings timezone. Other popular area codes that belong to Illinois state include 217, 224, 309, 312, 331, 618, 630, 708, 779, 815, 847, 872.
Date Changed | Change Details |
Apr 18, 2014 | Area code 312 subscribers are now overlayed with area code 773. Subscriber area code 773-253 is operational from Apr 18, 2014. |
Apr 18, 2014 | Area code 312 subscribers are now overlayed with area code 773. Subscriber area code 773-293 was assigned on May 22, 2006 and is operational from Apr 18, 2014. |
Apr 18, 2014 | Area code 312 subscribers are now overlayed with area code 773. Subscriber area code 773-270 was assigned on Jul 30, 2013 and is operational from Apr 18, 2014. |
Feb 12, 2014 | Area code 312 subscribers are now overlayed with area code 773. Subscriber area code 773-297 is operational from Feb 12, 2014. |
Feb 12, 2014 | Area code 312 subscribers are now overlayed with area code 773. Subscriber area code 773-272 was assigned on Mar 05, 2004 and is operational from Feb 12, 2014. |
Feb 12, 2014 | Area code 312 subscribers are now overlayed with area code 773. Subscriber area code 773-243 was assigned on Mar 05, 2004 and is operational from Feb 12, 2014. |
Area Code | City | County | Population | Network Operator |
773-201 | Burr Ridge | Cook | 519,467 | USA Mobility Wireless Inc |
773-202 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-203 | Burr Ridge | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-204 | Burr Ridge | Cook | 519,467 | USA Mobility Wireless Inc |
773-205 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-206 | Burr Ridge | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-207 | Burr Ridge | Cook | 519,467 | USA Mobility Wireless Inc |
773-208 | Burr Ridge | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-209 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-210 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-211 | 945,213 | Community Support And Referral Services | ||
773-212 | Burr Ridge | Cook | 519,467 | USA Mobility Wireless Inc |
773-213 | Burr Ridge | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-214 | Burr Ridge | Cook | 519,467 | USA Mobility Wireless Inc |
773-215 | Burr Ridge | Cook | 519,467 | USA Mobility Wireless Inc |
773-216 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-217-9 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-217-7 | Chicago | Cook | 519,467 | Local Access LLC - IL |
773-217-1 | Chicago | Cook | 519,467 | US Xchange of Illinois LLC dba Choice One Communications |
773-217-0 | Schaumburg | Cook | 519,467 | Denali Spectrum License LLC |
773-218 | Burr Ridge | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-219-0 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-219-3 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-219-9 | Elgin | Cook | 519,467 | T-Mobile USA Inc |
773-220 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-221 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-222 | Burr Ridge | Cook | 519,467 | USA Mobility Wireless Inc |
773-223 | Burr Ridge | Cook | 519,467 | USA Mobility Wireless Inc |
773-224 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-225-2 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-225-3 | Chicago | Cook | 519,467 | Paetec Communications Inc - IL |
773-225-0 | Chicago | Cook | 519,467 | T-Mobile USA Inc |
773-225-4 | Schaumburg | Cook | 519,467 | Denali Spectrum License LLC |
773-226-8 | Chicago | Cook | 519,467 | Peerless Network of Illinois LLC - IL |
773-226-0 | Elgin | Cook | 519,467 | T-Mobile USA Inc |
773-227 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-228 | Burr Ridge | Cook | 519,467 | USA Mobility Wireless Inc |
773-229 | Summit | Cook | 519,467 | Ameritech Illinois |
773-230 | Buffalo Grove | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-231-9 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-231-0 | Chicago | Cook | 519,467 | Level 3 Communications LLC - IL |
773-231-4 | Elgin | Cook | 519,467 | T-Mobile USA Inc |
773-232 | Burr Ridge | Cook | 519,467 | USA Mobility Wireless Inc |
773-233 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-234-0 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-235 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-236-7 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-236-8 | Chicago | Cook | 519,467 | Level 3 Communications LLC - IL |
773-236-0 | Elgin | Cook | 519,467 | T-Mobile USA Inc |
773-237 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-238 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-239 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-240-0 | Elgin | Cook | 519,467 | T-Mobile USA Inc |
773-241-0 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-241-8 | Chicago | Cook | 519,467 | Broadwing Communications LLC - IL |
773-241-3 | Chicago | Cook | 519,467 | First Communications LLC - IL |
773-241-9 | Elgin | Cook | 519,467 | Cellco Partnership dba Verizon Wireless - IL |
773-242-2 | Chicago | Cook | 519,467 | Access One Inc - IL |
773-242-9 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-242-6 | Chicago | Cook | 519,467 | Level 3 Communications LLC - IL |
773-242-0 | Cicero | Cook | 519,467 | Ameritech Illinois |
773-242-5 | Elgin | Cook | 519,467 | T-Mobile USA Inc |
773-243-9 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-243-7 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-243-0 | Wood Dale | Cook | 519,467 | XO Illinois Inc |
773-244 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-245-5 | Chicago | Cook | 519,467 | Allegiance Telecom of Illinois Inc |
773-245-0 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-245-2 | Chicago | Cook | 519,467 | Level 3 Communications LLC - IL |
773-245-4 | Chicago | Cook | 519,467 | Ovation Communications of Illinois Inc |
773-245-9 | Oak Brook | Cook | 519,467 | YMax Communications Corporation - IL |
773-246 | Hammond | Cook | 519,467 | Indiana Paging Network Inc |
773-247 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-248 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-249-0 | Bensenville | Cook | 519,467 | MCImetro Access Transmission Services LLC |
773-249-8 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-249-4 | Chicago | Cook | 519,467 | Broadwing Communications LLC - IL |
773-249-3 | Chicago | Cook | 519,467 | First Communications LLC - IL |
773-249-5 | Chicago | Cook | 519,467 | Paetec Communications Inc - IL |
773-249-2 | Wood Dale | Cook | 519,467 | XO Illinois Inc |
773-250-4 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-250-0 | Bensenville | Cook | 519,467 | MCImetro Access Transmission Services LLC |
773-250-5 | Chicago | Cook | 519,467 | Access One Inc - IL |
773-250-7 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-250-6 | Chicago | Cook | 519,467 | Level 3 Communications LLC - IL |
773-251 | Buffalo Grove | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-252 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-253-6 | Arlington Heights | Cook | 519,467 | Broadwing Communications LLC - IL |
773-253-1 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-253-3 | Chicago | Cook | 519,467 | Access One Inc - IL |
773-253-5 | Chicago | Cook | 519,467 | Broadwing Communications LLC - IL |
773-253-8 | Chicago | Cook | 519,467 | Comcast Phone of Illinois LLC - IL |
773-253-0 | Chicago | Cook | 519,467 | Teleport Communications America LLC - IL |
773-253-9 | Naperville | Cook | 519,467 | Sigecom LLC - IL |
773-254 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-255 | Buffalo Grove | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-256-0 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-256-9 | Chicago | Cook | 519,467 | Broadwing Communications LLC - IL |
773-256-8 | Elgin | Cook | 519,467 | Cellco Partnership dba Verizon Wireless - IL |
773-257-0 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-257-3 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-258 | Burr Ridge | Cook | 519,467 | USA Mobility Wireless Inc |
773-259 | Burr Ridge | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-260-0 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-261 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-262 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-263 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-264 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-265 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-266 | Burr Ridge | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-267 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-268 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-269-9 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-269-6 | Chicago | Cook | 519,467 | First Communications LLC - IL |
773-270-0 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-270-9 | Chicago | Cook | 519,467 | Level 3 Communications LLC - IL |
773-271 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-272-7 | Arlington Heights | Cook | 519,467 | Broadwing Communications LLC - IL |
773-272-8 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-273-9 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-273-5 | Chicago | Cook | 519,467 | T-Mobile USA Inc |
773-274 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-275 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-276 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-277 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-278 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-279-0 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-280-0 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-280-9 | Oak Brook | Cook | 519,467 | YMax Communications Corporation - IL |
773-281 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-282 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-283 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-284 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-285 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-286 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-287 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-288-0 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-289-0 | Arlington Heights | Cook | 519,467 | Broadwing Communications LLC - IL |
773-289-4 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-290-0 | Arlington Heights | Cook | 519,467 | Broadwing Communications LLC - IL |
773-290-1 | Chicago | Cook | 519,467 | Cbeyond Communications LLC - IL |
773-291 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-292 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-293-0 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-294 | Buffalo Grove | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-295-8 | Arlington Heights | Cook | 519,467 | Broadwing Communications LLC - IL |
773-295-3 | Chicago | Cook | 519,467 | First Communications LLC - IL |
773-296 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-297 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-298 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-299-5 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-299-8 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
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