Prefix Information

The prefix 643 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-643-0000 through 312-643-9999).

Browse Numbers in This Prefix

312-643-0000-0999 312-643-1000-1999 312-643-2000-2999 312-643-3000-3999 312-643-4000-4999 312-643-5000-5999 312-643-6000-6999 312-643-7000-7999 312-643-8000-8999 312-643-9000-9999

Sample Numbers

(312) 643-0000 (312) 643-1234 (312) 643-2000 (312) 643-3333 (312) 643-4444 (312) 643-5555 (312) 643-6000 (312) 643-7777 (312) 643-8888 (312) 643-9999