Prefix Information

The prefix 720 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-720-0000 through 312-720-9999).

Browse Numbers in This Prefix

312-720-0000-0999 312-720-1000-1999 312-720-2000-2999 312-720-3000-3999 312-720-4000-4999 312-720-5000-5999 312-720-6000-6999 312-720-7000-7999 312-720-8000-8999 312-720-9000-9999

Sample Numbers

(312) 720-0000 (312) 720-1234 (312) 720-2000 (312) 720-3333 (312) 720-4444 (312) 720-5555 (312) 720-6000 (312) 720-7777 (312) 720-8888 (312) 720-9999