Prefix Information

The prefix 399 is part of area code 650 serving San Mateo, California.

This exchange contains 10,000 possible phone numbers (650-399-0000 through 650-399-9999).

Browse Numbers in This Prefix

650-399-0000-0999 650-399-1000-1999 650-399-2000-2999 650-399-3000-3999 650-399-4000-4999 650-399-5000-5999 650-399-6000-6999 650-399-7000-7999 650-399-8000-8999 650-399-9000-9999

Sample Numbers

(650) 399-0000 (650) 399-1234 (650) 399-2000 (650) 399-3333 (650) 399-4444 (650) 399-5555 (650) 399-6000 (650) 399-7777 (650) 399-8888 (650) 399-9999