Prefix Information

The prefix 804 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-804-0000 through 312-804-9999).

Browse Numbers in This Prefix

312-804-0000-0999 312-804-1000-1999 312-804-2000-2999 312-804-3000-3999 312-804-4000-4999 312-804-5000-5999 312-804-6000-6999 312-804-7000-7999 312-804-8000-8999 312-804-9000-9999

Sample Numbers

(312) 804-0000 (312) 804-1234 (312) 804-2000 (312) 804-3333 (312) 804-4444 (312) 804-5555 (312) 804-6000 (312) 804-7777 (312) 804-8888 (312) 804-9999