Prefix Information

The prefix 203 is part of area code 510 serving Oakland, California.

This exchange contains 10,000 possible phone numbers (510-203-0000 through 510-203-9999).

Browse Numbers in This Prefix

510-203-0000-0999 510-203-1000-1999 510-203-2000-2999 510-203-3000-3999 510-203-4000-4999 510-203-5000-5999 510-203-6000-6999 510-203-7000-7999 510-203-8000-8999 510-203-9000-9999

Sample Numbers

(510) 203-0000 (510) 203-1234 (510) 203-2000 (510) 203-3333 (510) 203-4444 (510) 203-5555 (510) 203-6000 (510) 203-7777 (510) 203-8888 (510) 203-9999