Prefix Information

The prefix 780 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-780-0000 through 312-780-9999).

Browse Numbers in This Prefix

312-780-0000-0999 312-780-1000-1999 312-780-2000-2999 312-780-3000-3999 312-780-4000-4999 312-780-5000-5999 312-780-6000-6999 312-780-7000-7999 312-780-8000-8999 312-780-9000-9999

Sample Numbers

(312) 780-0000 (312) 780-1234 (312) 780-2000 (312) 780-3333 (312) 780-4444 (312) 780-5555 (312) 780-6000 (312) 780-7777 (312) 780-8888 (312) 780-9999