Prefix Information

The prefix 231 is part of area code 510 serving Oakland, California.

This exchange contains 10,000 possible phone numbers (510-231-0000 through 510-231-9999).

Browse Numbers in This Prefix

510-231-0000-0999 510-231-1000-1999 510-231-2000-2999 510-231-3000-3999 510-231-4000-4999 510-231-5000-5999 510-231-6000-6999 510-231-7000-7999 510-231-8000-8999 510-231-9000-9999

Sample Numbers

(510) 231-0000 (510) 231-1234 (510) 231-2000 (510) 231-3333 (510) 231-4444 (510) 231-5555 (510) 231-6000 (510) 231-7777 (510) 231-8888 (510) 231-9999