Prefix Information

The prefix 399 is part of area code 720 serving Denver, Colorado.

This exchange contains 10,000 possible phone numbers (720-399-0000 through 720-399-9999).

Browse Numbers in This Prefix

720-399-0000-0999 720-399-1000-1999 720-399-2000-2999 720-399-3000-3999 720-399-4000-4999 720-399-5000-5999 720-399-6000-6999 720-399-7000-7999 720-399-8000-8999 720-399-9000-9999

Sample Numbers

(720) 399-0000 (720) 399-1234 (720) 399-2000 (720) 399-3333 (720) 399-4444 (720) 399-5555 (720) 399-6000 (720) 399-7777 (720) 399-8888 (720) 399-9999