Prefix Information

The prefix 306 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-306-0000 through 312-306-9999).

Browse Numbers in This Prefix

312-306-0000-0999 312-306-1000-1999 312-306-2000-2999 312-306-3000-3999 312-306-4000-4999 312-306-5000-5999 312-306-6000-6999 312-306-7000-7999 312-306-8000-8999 312-306-9000-9999

Sample Numbers

(312) 306-0000 (312) 306-1234 (312) 306-2000 (312) 306-3333 (312) 306-4444 (312) 306-5555 (312) 306-6000 (312) 306-7777 (312) 306-8888 (312) 306-9999