AmyJo's Mysterious Zip Code

Before AmyJo left for Zen Buddhist Summer Camp she posted an address in case anyone wanted to write to her. She gave the wrong zip code, I mean the zip code wasn't even close.
Here is her correct mailing address:

Amy Parker
c/0 Tassajara ZMC
39171 Tassajara Rd
Carmel Valley CA 93924-9316

Btw, her birthday is this Sunday, July the 2nd.