Prefix Information

The prefix 404 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-404-0000 through 312-404-9999).

Browse Numbers in This Prefix

312-404-0000-0999 312-404-1000-1999 312-404-2000-2999 312-404-3000-3999 312-404-4000-4999 312-404-5000-5999 312-404-6000-6999 312-404-7000-7999 312-404-8000-8999 312-404-9000-9999

Sample Numbers

(312) 404-0000 (312) 404-1234 (312) 404-2000 (312) 404-3333 (312) 404-4444 (312) 404-5555 (312) 404-6000 (312) 404-7777 (312) 404-8888 (312) 404-9999