Prefix Information

The prefix 664 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-664-0000 through 312-664-9999).

Browse Numbers in This Prefix

312-664-0000-0999 312-664-1000-1999 312-664-2000-2999 312-664-3000-3999 312-664-4000-4999 312-664-5000-5999 312-664-6000-6999 312-664-7000-7999 312-664-8000-8999 312-664-9000-9999

Sample Numbers

(312) 664-0000 (312) 664-1234 (312) 664-2000 (312) 664-3333 (312) 664-4444 (312) 664-5555 (312) 664-6000 (312) 664-7777 (312) 664-8888 (312) 664-9999