Prefix Information

The prefix 423 is part of area code 650 serving San Mateo, California.

This exchange contains 10,000 possible phone numbers (650-423-0000 through 650-423-9999).

Browse Numbers in This Prefix

650-423-0000-0999 650-423-1000-1999 650-423-2000-2999 650-423-3000-3999 650-423-4000-4999 650-423-5000-5999 650-423-6000-6999 650-423-7000-7999 650-423-8000-8999 650-423-9000-9999

Sample Numbers

(650) 423-0000 (650) 423-1234 (650) 423-2000 (650) 423-3333 (650) 423-4444 (650) 423-5555 (650) 423-6000 (650) 423-7777 (650) 423-8888 (650) 423-9999