Leave the zip codes alone unless you are going to tie them in with the USPS. I am tired of your maps telling me where I live doesn't exist & then changing the zip code to one you think exists. I have lived here for 17 years & the Post Office has not notified me of any zip code change.

I used to trust & use Yahoo maps because you were the most accurate. You are now almost as bad as Google & Bing. Not a good thing.

Here is the Info directly from the USPS web site.

PERRIS CA 92570
PERRIS CA 92571
PERRIS CA 92572  This ZIP Code used for a specific PO BOX
PERRIS CA 92599  This is a UNIQUE ZIP Code™ used for a specific company or organization