stolen iphone

Really. For you to track an iPhone it needs to have Find My enabled, and you need to know the Apple ID and password used to activate it.

If it is activated with a carrier and turned on the carrier can find its approximate location based on the cell towers it is connected to, but they aren’t going to tell you. They may tell law enforcement authorities if the police ask for that information.

Then you can’t track it.

There is no way to find it given the conditions you describe.