is there a way to track activation of my stolen iPhone?
I was wondering if I would be able to track if my stolen iPhone has been activated by anyone, I have my box with all serial numbers, etc
Sorry, no. You could only track your phone if Find My Phone was setup/activated BEFORE you lost your phone. However, one only has to restore the phone to defeat Find My Phone & then use it. If your carrier offers blacklisting, that can prevent the phone from being activated as a phone, but not tracked.