The main problem with trackers is that they work based on a page redirect and many sites do not allow that..
For example:
PTC Ad on Clixsense leads to -> Tracker Site that logs the click data and redirects to-> Actual Site Advertised
CAUTION: You should be careful with trackers because some sites restrict automatically redirecting links, so it may put your account at risk..
Just make sure that there's no rule against redirecting links and it will be fine to use them. You can also ask the support just to make sure.
So, one free tracker that I've stumbled upon is
linktrack.info, it provides a simple free-to-use tracker and two premium options for additional services and more detailed information about the tracked clicks.
But the basic free service seems to be adequate for what you need it for (it provides diagrams and IP addresses listing).
It also uses a premium sales commission based affiliate system in case you're interested in that as well.
And I am a member of it so I can also provide you with my referral link if you would like to join under me.
Just let me know and I'll PM you my ref link.