Prefix Information

The prefix 664 is part of area code 815 serving Rockford, Illinois.

This exchange contains 10,000 possible phone numbers (815-664-0000 through 815-664-9999).

Browse Numbers in This Prefix

815-664-0000-0999 815-664-1000-1999 815-664-2000-2999 815-664-3000-3999 815-664-4000-4999 815-664-5000-5999 815-664-6000-6999 815-664-7000-7999 815-664-8000-8999 815-664-9000-9999

Sample Numbers

(815) 664-0000 (815) 664-1234 (815) 664-2000 (815) 664-3333 (815) 664-4444 (815) 664-5555 (815) 664-6000 (815) 664-7777 (815) 664-8888 (815) 664-9999