Prefix Information

The prefix 023 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-023-0000 through 312-023-9999).

Browse Numbers in This Prefix

312-023-0000-0999 312-023-1000-1999 312-023-2000-2999 312-023-3000-3999 312-023-4000-4999 312-023-5000-5999 312-023-6000-6999 312-023-7000-7999 312-023-8000-8999 312-023-9000-9999

Sample Numbers

(312) 023-0000 (312) 023-1234 (312) 023-2000 (312) 023-3333 (312) 023-4444 (312) 023-5555 (312) 023-6000 (312) 023-7777 (312) 023-8888 (312) 023-9999