Prefix Information

The prefix 623 is part of area code 650 serving San Mateo, California.

This exchange contains 10,000 possible phone numbers (650-623-0000 through 650-623-9999).

Browse Numbers in This Prefix

650-623-0000-0999 650-623-1000-1999 650-623-2000-2999 650-623-3000-3999 650-623-4000-4999 650-623-5000-5999 650-623-6000-6999 650-623-7000-7999 650-623-8000-8999 650-623-9000-9999

Sample Numbers

(650) 623-0000 (650) 623-1234 (650) 623-2000 (650) 623-3333 (650) 623-4444 (650) 623-5555 (650) 623-6000 (650) 623-7777 (650) 623-8888 (650) 623-9999