Prefix Information

The prefix 638 is part of area code 312 serving Chicago, Illinois.

This exchange contains 10,000 possible phone numbers (312-638-0000 through 312-638-9999).

Browse Numbers in This Prefix

312-638-0000-0999 312-638-1000-1999 312-638-2000-2999 312-638-3000-3999 312-638-4000-4999 312-638-5000-5999 312-638-6000-6999 312-638-7000-7999 312-638-8000-8999 312-638-9000-9999

Sample Numbers

(312) 638-0000 (312) 638-1234 (312) 638-2000 (312) 638-3333 (312) 638-4444 (312) 638-5555 (312) 638-6000 (312) 638-7777 (312) 638-8888 (312) 638-9999