When tracking an iPhone does the phone being tracked know?

When tracking an iPhone does the phone being tracked know?

I don't know if I understand your question. But If you have your network ON and you have som apps running in the background that has localization settings, then yes.

And also if you have iCloud on and turned on "Find My iPhone" then it is constantly tracked until it has no battery.

Find more at Apple Customer Support

No. It will know if it has been locked or remotely wiped though.

Well yea. The app would have to be installed in order for it to happen in the 1st place. Also there would be an icon on the status bar indicating that location services are being used.