Prefix Information

The prefix 400 is part of area code 415 serving San Francisco, California.

This exchange contains 10,000 possible phone numbers (415-400-0000 through 415-400-9999).

Browse Numbers in This Prefix

415-400-0000-0999 415-400-1000-1999 415-400-2000-2999 415-400-3000-3999 415-400-4000-4999 415-400-5000-5999 415-400-6000-6999 415-400-7000-7999 415-400-8000-8999 415-400-9000-9999

Sample Numbers

(415) 400-0000 (415) 400-1234 (415) 400-2000 (415) 400-3333 (415) 400-4444 (415) 400-5555 (415) 400-6000 (415) 400-7777 (415) 400-8888 (415) 400-9999