Tracking companies have started disguising their third-party trackers as first-party trackers to bypass privacy tools, called CNAME tracking. This tool called TrackingTheTrackers can find them.
This method is called CNAME Cloaking and the disguise is not obvious if one does not know where to look. That’s why we made a free analysis tool that anyone can run on any website. We also wrote an in-depth article about this, you can read it here.