Prefix Information

The prefix 640 is part of area code 650 serving San Mateo, California.

This exchange contains 10,000 possible phone numbers (650-640-0000 through 650-640-9999).

Browse Numbers in This Prefix

650-640-0000-0999 650-640-1000-1999 650-640-2000-2999 650-640-3000-3999 650-640-4000-4999 650-640-5000-5999 650-640-6000-6999 650-640-7000-7999 650-640-8000-8999 650-640-9000-9999

Sample Numbers

(650) 640-0000 (650) 640-1234 (650) 640-2000 (650) 640-3333 (650) 640-4444 (650) 640-5555 (650) 640-6000 (650) 640-7777 (650) 640-8888 (650) 640-9999