Prefix Information

The prefix 540 is part of area code 650 serving San Mateo, California.

This exchange contains 10,000 possible phone numbers (650-540-0000 through 650-540-9999).

Browse Numbers in This Prefix

650-540-0000-0999 650-540-1000-1999 650-540-2000-2999 650-540-3000-3999 650-540-4000-4999 650-540-5000-5999 650-540-6000-6999 650-540-7000-7999 650-540-8000-8999 650-540-9000-9999

Sample Numbers

(650) 540-0000 (650) 540-1234 (650) 540-2000 (650) 540-3333 (650) 540-4444 (650) 540-5555 (650) 540-6000 (650) 540-7777 (650) 540-8888 (650) 540-9999