Prefix Information

The prefix 243 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-243-0000 through 312-243-9999).

Browse Numbers in This Prefix

312-243-0000-0999 312-243-1000-1999 312-243-2000-2999 312-243-3000-3999 312-243-4000-4999 312-243-5000-5999 312-243-6000-6999 312-243-7000-7999 312-243-8000-8999 312-243-9000-9999

Sample Numbers

(312) 243-0000 (312) 243-1234 (312) 243-2000 (312) 243-3333 (312) 243-4444 (312) 243-5555 (312) 243-6000 (312) 243-7777 (312) 243-8888 (312) 243-9999