Prefix Information

The prefix 021 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-021-0000 through 312-021-9999).

Browse Numbers in This Prefix

312-021-0000-0999 312-021-1000-1999 312-021-2000-2999 312-021-3000-3999 312-021-4000-4999 312-021-5000-5999 312-021-6000-6999 312-021-7000-7999 312-021-8000-8999 312-021-9000-9999

Sample Numbers

(312) 021-0000 (312) 021-1234 (312) 021-2000 (312) 021-3333 (312) 021-4444 (312) 021-5555 (312) 021-6000 (312) 021-7777 (312) 021-8888 (312) 021-9999