Prefix Information

The prefix 401 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-401-0000 through 312-401-9999).

Browse Numbers in This Prefix

312-401-0000-0999 312-401-1000-1999 312-401-2000-2999 312-401-3000-3999 312-401-4000-4999 312-401-5000-5999 312-401-6000-6999 312-401-7000-7999 312-401-8000-8999 312-401-9000-9999

Sample Numbers

(312) 401-0000 (312) 401-1234 (312) 401-2000 (312) 401-3333 (312) 401-4444 (312) 401-5555 (312) 401-6000 (312) 401-7777 (312) 401-8888 (312) 401-9999