If you don't know this then it is likely that you don't know other laws as well. I'd strongly suggest you read up on the various relevant laws before you venture out, lest you accidentally become a criminal.
To answer your question, you can only loaded open carry in unincorporated territory where the discharge of a firearm is not prohibited. You can unloaded open carry in incorporated territory.
Seriously though, please consider studying the laws more before you open carry. Watch pullnshoot25's videos, read the memos at californiaopencarry.org, search the forums for any questions you still may have, and ask any which you cannot find answers to.