Prefix Information

The prefix 307 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-307-0000 through 312-307-9999).

Browse Numbers in This Prefix

312-307-0000-0999 312-307-1000-1999 312-307-2000-2999 312-307-3000-3999 312-307-4000-4999 312-307-5000-5999 312-307-6000-6999 312-307-7000-7999 312-307-8000-8999 312-307-9000-9999

Sample Numbers

(312) 307-0000 (312) 307-1234 (312) 307-2000 (312) 307-3333 (312) 307-4444 (312) 307-5555 (312) 307-6000 (312) 307-7777 (312) 307-8888 (312) 307-9999