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 773-530 was assigned on Jan 03, 2005 and is operational from Apr 18, 2014. |
Apr 18, 2014 | Area code 312 subscribers are now overlayed with area code 773. Subscriber area code 773-564 is operational from Apr 18, 2014. |
Apr 18, 2014 | Area code 312 subscribers are now overlayed with area code 773. Subscriber area code 773-516 was assigned on Sep 15, 2006 and is operational from Apr 18, 2014. |
Feb 16, 2014 | Area code 312 subscribers are now overlayed with area code 773. Subscriber area code 773-589 was assigned on Jan 21, 2014 and is operational from Feb 16, 2014. |
Feb 12, 2014 | Area code 312 subscribers are now overlayed with area code 773. Subscriber area code 773-556 was assigned on Jan 21, 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 773-507 was assigned on Feb 14, 2001 and is operational from Feb 12, 2014. |
Area Code | City | County | Population | Network Operator |
773-501 | Chicago | Cook | 519,467 | T-Mobile USA Inc |
773-502 | Elgin | Cook | 519,467 | Cellco Partnership dba Verizon Wireless - IL |
773-503-8 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-503-0 | Elgin | Cook | 519,467 | T-Mobile USA Inc |
773-504 | Burr Ridge | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-505 | Elgin | Cook | 519,467 | Cellco Partnership dba Verizon Wireless - IL |
773-506 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-507 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-508 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-509 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-510 | Chicago | Cook | 519,467 | T-Mobile USA Inc |
773-511 | 65,513 | Travel Information Services | ||
773-512-0 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-512-2 | Chicago | Cook | 519,467 | T-Mobile USA Inc |
773-513-0 | Burr Ridge | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-514 | Chicago | Cook | 519,467 | American Messaging (AM) Inc |
773-515-0 | Elgin | Cook | 519,467 | Cellco Partnership dba Verizon Wireless - IL |
773-516-9 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-516-4 | Chicago | Cook | 519,467 | Comcast Phone of Illinois LLC - IL |
773-516-0 | Chicago | Cook | 519,467 | Neutral Tandem-Illinois LLC - IL |
773-516-6 | Chicago | Cook | 519,467 | Paetec Communications Inc - IL |
773-516-3 | Chicago | Cook | 519,467 | T-Mobile USA Inc |
773-517 | Chicago | Cook | 519,467 | T-Mobile USA Inc |
773-518-0 | Elgin | Cook | 519,467 | Cellco Partnership dba Verizon Wireless - IL |
773-519-0 | Elgin | Cook | 519,467 | Cellco Partnership dba Verizon Wireless - IL |
773-520 | Elgin | Cook | 519,467 | Cellco Partnership dba Verizon Wireless - IL |
773-521 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-522 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-523 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-524-0 | Arlington Heights | Cook | 519,467 | Broadwing Communications LLC - IL |
773-524-6 | Chicago | Cook | 519,467 | Level 3 Communications LLC - IL |
773-524-9 | Chicago | Cook | 519,467 | T-Mobile USA Inc |
773-525 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-526-4 | Chicago | Cook | 519,467 | First Communications LLC - IL |
773-526-0 | Chicago | Cook | 519,467 | Ovation Communications of Illinois Inc |
773-526-7 | Chicago | Cook | 519,467 | XO Illinois Inc |
773-526-9 | Elgin | Cook | 519,467 | T-Mobile USA Inc |
773-527-0 | Arlington Heights | Cook | 519,467 | Broadwing Communications LLC - IL |
773-527-9 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-527-8 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-528 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-529 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-530-0 | Chicago | Cook | 519,467 | Comcast Phone of Illinois LLC - IL |
773-530-3 | Chicago | Cook | 519,467 | Level 3 Communications LLC - IL |
773-530-9 | Schaumburg | Cook | 519,467 | Denali Spectrum License LLC |
773-531 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-532-0 | Burr Ridge | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-533 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-534 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-535 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-536-0 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-536-9 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-536-7 | Elgin | Cook | 519,467 | Cellco Partnership dba Verizon Wireless - IL |
773-537-4 | Chicago | Cook | 519,467 | Cbeyond Communications LLC - IL |
773-537-0 | Chicago | Cook | 519,467 | CIMCO Communications Inc - IL |
773-537-7 | Chicago | Cook | 519,467 | First Communications LLC - IL |
773-537-8 | Chicago | Cook | 519,467 | T-Mobile USA Inc |
773-538-0 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-538-3 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-539 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-540-8 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-540-0 | Chicago | Cook | 519,467 | T-Mobile USA Inc |
773-541-0 | Chicago | Cook | 519,467 | Global Crossing Local Services Inc - IL |
773-541-4 | Chicago | Cook | 519,467 | Level 3 Communications LLC - IL |
773-541-1 | Chicago | Cook | 519,467 | T-Mobile USA Inc |
773-542-0 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-542-3 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-543-0 | Chicago | Cook | 519,467 | T-Mobile USA Inc |
773-544 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-545 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-546-0 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-546-9 | Chicago | Cook | 519,467 | Level 3 Communications LLC - IL |
773-546-8 | Elgin | Cook | 519,467 | T-Mobile USA Inc |
773-547 | Burr Ridge | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-548-0 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-548-2 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-549 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-550 | Elgin | Cook | 519,467 | Cellco Partnership dba Verizon Wireless - IL |
773-551 | Buffalo Grove | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-552 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-553-9 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-553-0 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-554-0 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-554-3 | Chicago | Cook | 519,467 | US Xchange of Illinois LLC dba Choice One Communications |
773-554-9 | Schaumburg | Cook | 519,467 | Denali Spectrum License LLC |
773-555 | 379,557 | DIRECTORY ASSISTANCE | ||
773-556-0 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-556-3 | Buffalo Grove | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-557-6 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-557-9 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-557-7 | Chicago | Cook | 519,467 | Cbeyond Communications LLC - IL |
773-557-0 | Chicago | Cook | 519,467 | Ovation Communications of Illinois Inc |
773-557-4 | Park Ridge | Cook | 519,467 | Ameritech Illinois |
773-558-1 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-558-0 | Elgin | Cook | 519,467 | Cellco Partnership dba Verizon Wireless - IL |
773-559-0 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-560 | Burr Ridge | Cook | 519,467 | USA Mobility Wireless Inc |
773-561 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-562 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-563-0 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-564-9 | Chicago | Cook | 519,467 | Comcast Phone of Illinois LLC - IL |
773-565-8 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-566 | Burr Ridge | Cook | 519,467 | USA Mobility Wireless Inc |
773-567-0 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-568 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-569-2 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-569-0 | Elk Grove Village | Cook | 519,467 | Ameritech Illinois |
773-570-0 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-571-0 | Elgin | Cook | 519,467 | Cellco Partnership dba Verizon Wireless - IL |
773-572-0 | Chicago | Cook | 519,467 | Broadwing Communications LLC - IL |
773-573-0 | Chicago | Cook | 519,467 | XO Illinois Inc |
773-574-0 | Elgin | Cook | 519,467 | T-Mobile USA Inc |
773-575 | Schaumburg | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-576 | Burr Ridge | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-577-9 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-577-8 | Chicago | Cook | 519,467 | First Communications LLC - IL |
773-578-0 | Burr Ridge | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-579 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-580 | Schaumburg | Cook | 519,467 | New Cingular Wireless PCS LLC - IL |
773-581 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-582 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-583 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-584-3 | Arlington Heights | Cook | 519,467 | Broadwing Communications LLC - IL |
773-584-8 | Elgin | Cook | 519,467 | T-Mobile USA Inc |
773-585 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-586 | Summit | Cook | 519,467 | Ameritech Illinois |
773-587-0 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-588 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-589-4 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
773-590 | Elgin | Cook | 519,467 | Cellco Partnership dba Verizon Wireless - IL |
773-591 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-592 | Chicago | Cook | 519,467 | T-Mobile USA Inc |
773-593 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-594 | Chicago | Cook | 519,467 | Ameritech Illinois |
773-595-4 | Chicago | Cook | 519,467 | XO Illinois Inc |
773-596-8 | Arlington Heights | Cook | 519,467 | Sprint Spectrum LP |
773-597-4 | Chicago | Cook | 519,467 | Broadwing Communications LLC - IL |
773-598-7 | Bridgeview | Cook | 519,467 | Sprint Spectrum LP |
773-598-8 | Chicago | Cook | 519,467 | Level 3 Communications LLC - IL |
773-599-9 | Chicago | Cook | 519,467 | Bandwidth.com CLEC LLC - IL |
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