Prefix Information

The prefix 603 is part of area code 650 serving San Mateo, California.

This exchange contains 10,000 possible phone numbers (650-603-0000 through 650-603-9999).

Browse Numbers in This Prefix

650-603-0000-0999 650-603-1000-1999 650-603-2000-2999 650-603-3000-3999 650-603-4000-4999 650-603-5000-5999 650-603-6000-6999 650-603-7000-7999 650-603-8000-8999 650-603-9000-9999

Sample Numbers

(650) 603-0000 (650) 603-1234 (650) 603-2000 (650) 603-3333 (650) 603-4444 (650) 603-5555 (650) 603-6000 (650) 603-7777 (650) 603-8888 (650) 603-9999