Prefix Information

The prefix 999 is part of area code 650 serving San Mateo, California.

This exchange contains 10,000 possible phone numbers (650-999-0000 through 650-999-9999).

Browse Numbers in This Prefix

650-999-0000-0999 650-999-1000-1999 650-999-2000-2999 650-999-3000-3999 650-999-4000-4999 650-999-5000-5999 650-999-6000-6999 650-999-7000-7999 650-999-8000-8999 650-999-9000-9999

Sample Numbers

(650) 999-0000 (650) 999-1234 (650) 999-2000 (650) 999-3333 (650) 999-4444 (650) 999-5555 (650) 999-6000 (650) 999-7777 (650) 999-8888 (650) 999-9999