| District of Illinois area codes: 224 | |
|---|---|
| Country | United States |
| State/Province | Illinois |
| Major City | Chicago |
| Time Zone | Central |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 224-244 | Cook | Des Plaines, IL | Cellco Partnership DBA Verizon Wireless |
| 224-245 | Cook | Arlington Hts, IL | Sprint Spectrum L.p. |
| 224-246 | Cook | Northbrook, IL | Cellco Partnership DBA Verizon Wireless |
| 224-247 | Cook | Arlington Hts, IL | T-mobile Usa |
| 224-248 | Cook | Arlington Hts, IL | Sprint Spectrum L.p. |
| 224-249 | Mchenry | Algonquin, IL | Broadvox-clec |
| 224-250 | Cook | Des Plaines, IL | Cellco Partnership DBA Verizon Wireless |
| 224-251 | Cook | Skokie, IL | Ameritech Illinois |
| 224-252 | Lake | Grayslake, IL | Bandwidth.com Clec |
| 224-253 | Mchenry | Algonquin, IL | T-mobile Usa |
| 224-254 | Cook | Des Plaines, IL | Cellco Partnership DBA Verizon Wireless |
| 224-255 | Cook | Winnetka, IL | New Cingular Wireless PCS |
| 224-256 | Mchenry | Algonquin, IL | T-mobile Usa |
| 224-257 | Cook | Des Plaines, IL | Broadvox-clec |
| 224-260 | Cook | Glenview, IL | Sprint Spectrum L.p. |
| 224-261 | Cook | Northbrook, IL | Sprint Spectrum L.p. |
| 224-265 | Cook | Elk Grove Village, IL | First Communications LLC |
| 224-267 | Lake | Antioch, IL | Level 3 Communications |
| 224-268 | Metro PCS | ||
| 224-270 | Lake | Round Lake, IL | Mci Worldcom Communications |
There are 292 prefixes, In the code area, the major cities are Algonquin, IL;Arlington Heights, IL;Buffalo Grove,. The major city is Chicago.