Prefix Information

The prefix 621 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-621-0000 through 312-621-9999).

Browse Numbers in This Prefix

312-621-0000-0999 312-621-1000-1999 312-621-2000-2999 312-621-3000-3999 312-621-4000-4999 312-621-5000-5999 312-621-6000-6999 312-621-7000-7999 312-621-8000-8999 312-621-9000-9999

Sample Numbers

(312) 621-0000 (312) 621-1234 (312) 621-2000 (312) 621-3333 (312) 621-4444 (312) 621-5555 (312) 621-6000 (312) 621-7777 (312) 621-8888 (312) 621-9999