Prefix Information

The prefix 278 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-278-0000 through 312-278-9999).

Browse Numbers in This Prefix

312-278-0000-0999 312-278-1000-1999 312-278-2000-2999 312-278-3000-3999 312-278-4000-4999 312-278-5000-5999 312-278-6000-6999 312-278-7000-7999 312-278-8000-8999 312-278-9000-9999

Sample Numbers

(312) 278-0000 (312) 278-1234 (312) 278-2000 (312) 278-3333 (312) 278-4444 (312) 278-5555 (312) 278-6000 (312) 278-7777 (312) 278-8888 (312) 278-9999