Prefix Information

The prefix 378 is part of area code 815 serving Rockford, Illinois.

This exchange contains 10,000 possible phone numbers (815-378-0000 through 815-378-9999).

Browse Numbers in This Prefix

815-378-0000-0999 815-378-1000-1999 815-378-2000-2999 815-378-3000-3999 815-378-4000-4999 815-378-5000-5999 815-378-6000-6999 815-378-7000-7999 815-378-8000-8999 815-378-9000-9999

Sample Numbers

(815) 378-0000 (815) 378-1234 (815) 378-2000 (815) 378-3333 (815) 378-4444 (815) 378-5555 (815) 378-6000 (815) 378-7777 (815) 378-8888 (815) 378-9999