Prefix Information

The prefix 421 is part of area code 443 serving Baltimore, Maryland.

This exchange contains 10,000 possible phone numbers (443-421-0000 through 443-421-9999).

Browse Numbers in This Prefix

443-421-0000-0999 443-421-1000-1999 443-421-2000-2999 443-421-3000-3999 443-421-4000-4999 443-421-5000-5999 443-421-6000-6999 443-421-7000-7999 443-421-8000-8999 443-421-9000-9999

Sample Numbers

(443) 421-0000 (443) 421-1234 (443) 421-2000 (443) 421-3333 (443) 421-4444 (443) 421-5555 (443) 421-6000 (443) 421-7777 (443) 421-8888 (443) 421-9999