Prefix Information

The prefix 865 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-865-0000 through 312-865-9999).

Browse Numbers in This Prefix

312-865-0000-0999 312-865-1000-1999 312-865-2000-2999 312-865-3000-3999 312-865-4000-4999 312-865-5000-5999 312-865-6000-6999 312-865-7000-7999 312-865-8000-8999 312-865-9000-9999

Sample Numbers

(312) 865-0000 (312) 865-1234 (312) 865-2000 (312) 865-3333 (312) 865-4444 (312) 865-5555 (312) 865-6000 (312) 865-7777 (312) 865-8888 (312) 865-9999