Since the boundary changes sometime due to the reasons you stated, I sure will call the school to check before I buy a house.
When you find a house you are interested in, the best and easiest way is to call the school board. Boundaries change and the only way to be absolutely sure is to call and give them the address. They can tell you what school district it is in. Doesn't mean it won't change sometime down the road, neither does it mean the home you are currently in won't change.
The school web site does have a attendance boundary map. But I want to to be more specific about the address - matching - school.