Prefix Information

The prefix 421 is part of area code 858 serving San Diego, California.

This exchange contains 10,000 possible phone numbers (858-421-0000 through 858-421-9999).

Browse Numbers in This Prefix

858-421-0000-0999 858-421-1000-1999 858-421-2000-2999 858-421-3000-3999 858-421-4000-4999 858-421-5000-5999 858-421-6000-6999 858-421-7000-7999 858-421-8000-8999 858-421-9000-9999

Sample Numbers

(858) 421-0000 (858) 421-1234 (858) 421-2000 (858) 421-3333 (858) 421-4444 (858) 421-5555 (858) 421-6000 (858) 421-7777 (858) 421-8888 (858) 421-9999