Prefix Information

The prefix 309 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-309-0000 through 312-309-9999).

Browse Numbers in This Prefix

312-309-0000-0999 312-309-1000-1999 312-309-2000-2999 312-309-3000-3999 312-309-4000-4999 312-309-5000-5999 312-309-6000-6999 312-309-7000-7999 312-309-8000-8999 312-309-9000-9999

Sample Numbers

(312) 309-0000 (312) 309-1234 (312) 309-2000 (312) 309-3333 (312) 309-4444 (312) 309-5555 (312) 309-6000 (312) 309-7777 (312) 309-8888 (312) 309-9999