Interface craft take passangers and cargo to and from a planets surface into low or near orbit. There are only about three types of Starship that can make planet fall, they are all ZTT Black Globes and they’re all marine transports.

Therefore just about every starship in operation carries a spaceplane or shuttle or two. Small utility spaceplanes are sometimes termed shuttles, although its a soft term which blurs under the weight of so many thousands of variants.