Prefix Information

The prefix 856 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-856-0000 through 312-856-9999).

Browse Numbers in This Prefix

312-856-0000-0999 312-856-1000-1999 312-856-2000-2999 312-856-3000-3999 312-856-4000-4999 312-856-5000-5999 312-856-6000-6999 312-856-7000-7999 312-856-8000-8999 312-856-9000-9999

Sample Numbers

(312) 856-0000 (312) 856-1234 (312) 856-2000 (312) 856-3333 (312) 856-4444 (312) 856-5555 (312) 856-6000 (312) 856-7777 (312) 856-8888 (312) 856-9999