Area Code 312 - Chicago, Illinois

Phone numbers in the 312 area code

Phone Number Prefixes

Showing 20 of 728 prefixes in this area code:

312-200 312-201 312-202 312-203 312-204 312-205 312-206 312-207 312-208 312-209 312-210 312-212 312-213 312-214 312-215 312-216 312-217 312-218 312-219 312-220