Is it usually at the last airport you go to, or it varies?
For example, suppose I want to travel from JFK to Narita Tokyo.
A flight I see online takes me from JFK to Zurich, and then from Zurich to Tokyo, both operated by the same airline (Swiss Air).
Would I take to pick up my luggage in Zurich, and then again in Tokyo, or just Tokyo.
How do I find out? Would I need to call Swiss Air to find out?