Area Code 312

General Information
Country United States
State/Province Illinois
Major City Chicago
Time Zone Central (UTC-06:00)
Current Local Time 10:28

Area Code Prefixes

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

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