Prefix Information

The prefix 820 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-820-0000 through 312-820-9999).

Browse Numbers in This Prefix

312-820-0000-0999 312-820-1000-1999 312-820-2000-2999 312-820-3000-3999 312-820-4000-4999 312-820-5000-5999 312-820-6000-6999 312-820-7000-7999 312-820-8000-8999 312-820-9000-9999

Sample Numbers

(312) 820-0000 (312) 820-1234 (312) 820-2000 (312) 820-3333 (312) 820-4444 (312) 820-5555 (312) 820-6000 (312) 820-7777 (312) 820-8888 (312) 820-9999