Prefix Information

The prefix 421 is part of area code 610 serving Allentown, Pennsylvania.

This exchange contains 10,000 possible phone numbers (610-421-0000 through 610-421-9999).

Browse Numbers in This Prefix

610-421-0000-0999 610-421-1000-1999 610-421-2000-2999 610-421-3000-3999 610-421-4000-4999 610-421-5000-5999 610-421-6000-6999 610-421-7000-7999 610-421-8000-8999 610-421-9000-9999

Sample Numbers

(610) 421-0000 (610) 421-1234 (610) 421-2000 (610) 421-3333 (610) 421-4444 (610) 421-5555 (610) 421-6000 (610) 421-7777 (610) 421-8888 (610) 421-9999