Prefix Information

The prefix 331 is part of area code 610 serving Allentown, Pennsylvania.

This exchange contains 10,000 possible phone numbers (610-331-0000 through 610-331-9999).

Browse Numbers in This Prefix

610-331-0000-0999 610-331-1000-1999 610-331-2000-2999 610-331-3000-3999 610-331-4000-4999 610-331-5000-5999 610-331-6000-6999 610-331-7000-7999 610-331-8000-8999 610-331-9000-9999

Sample Numbers

(610) 331-0000 (610) 331-1234 (610) 331-2000 (610) 331-3333 (610) 331-4444 (610) 331-5555 (610) 331-6000 (610) 331-7777 (610) 331-8888 (610) 331-9999