Prefix Information

The prefix 421 is part of area code 313 serving Detroit, Michigan.

This exchange contains 10,000 possible phone numbers (313-421-0000 through 313-421-9999).

Browse Numbers in This Prefix

313-421-0000-0999 313-421-1000-1999 313-421-2000-2999 313-421-3000-3999 313-421-4000-4999 313-421-5000-5999 313-421-6000-6999 313-421-7000-7999 313-421-8000-8999 313-421-9000-9999

Sample Numbers

(313) 421-0000 (313) 421-1234 (313) 421-2000 (313) 421-3333 (313) 421-4444 (313) 421-5555 (313) 421-6000 (313) 421-7777 (313) 421-8888 (313) 421-9999