Prefix Information

The prefix 311 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-311-0000 through 312-311-9999).

Browse Numbers in This Prefix

312-311-0000-0999 312-311-1000-1999 312-311-2000-2999 312-311-3000-3999 312-311-4000-4999 312-311-5000-5999 312-311-6000-6999 312-311-7000-7999 312-311-8000-8999 312-311-9000-9999

Sample Numbers

(312) 311-0000 (312) 311-1234 (312) 311-2000 (312) 311-3333 (312) 311-4444 (312) 311-5555 (312) 311-6000 (312) 311-7777 (312) 311-8888 (312) 311-9999