| General Information | |
|---|---|
| Country | United States |
| State/Province | Illinois |
| Major City | Chicago |
| Time Zone | Central (UTC-06:00) |
| Current Local Time | 03:38 |
| Prefix | County | Primary City |
|---|---|---|
| 312-201 | Cook | Chicago |
| 312-202 | Cook | Chicago |
| 312-203 | Cook | Chicago |
| 312-204 | Cook | Chicago |
| 312-205 | Cook | Chicago |
| 312-206 | Cook | Chicago |
| 312-207 | Cook | Chicago |
| 312-208 | Cook | Chicago |
| 312-209 | Cook | Glenview |
| 312-212 | Cook | Chicago |
| 312-213 | Cook | Chicago |
| 312-214 | Cook | Chicago |
| 312-215 | Cook | Prospect Heights |
| 312-216 | Cook | Chicago |
| 312-217 | Cook | Chicago |
| 312-218 | Cook | Chicago |
| 312-219 | Cook | Chicago |
| 312-220 | Cook | Chicago |
| 312-221 | Cook | Chicago |
| 312-222 | Cook | Chicago |
| 312-223 | Cook | Chicago |
| 312-224 | Cook | Chicago |
| 312-225 | Cook | Chicago |
| 312-226 | Cook | Chicago |
| 312-227 | Cook | Chicago |
| 312-228 | Cook | Chicago |
| 312-229 | Cook | Chicago |
| 312-230 | Cook | Chicago |
| 312-231 | Dupage | Medinah |
| 312-232 | Cook | Chicago |
| 312-233 | Cook | Chicago |
| 312-234 | Cook | Chicago |
| 312-235 | Cook | Chicago |
| 312-236 | Cook | Chicago |
| 312-237 | Cook | Chicago |
| 312-238 | Cook | Chicago |
| 312-239 | Cook | Chicago |
| 312-240 | Cook | Chicago |
| 312-241 | Cook | Chicago |
| 312-242 | Cook | Chicago |
| 312-243 | Cook | Chicago |
| 312-244 | Cook | Chicago |
| 312-245 | Cook | Chicago |
| 312-246 | Cook | Prospect Heights |
| 312-247 | Cook | Chicago |
| 312-248 | Cook | Chicago |
| 312-249 | Cook | Chicago |
| 312-250 | Cook | Chicago |
| 312-251 | Cook | Chicago |
| 312-252 | Cook | Chicago |