Yes, looking up a plane by its tail number (technically called its registration number) is a standard practice for aviation enthusiasts and travelers. Every aircraft has a unique alphanumeric code—like "N12345" for the US or "G-XXXX" for the UK—visible on the rear of the fuselage. By entering this code into tracking sites like FlightRadar24, FlightAware, or ADS-B Exchange, you can see the aircraft's specific model, age, owner, and real-time flight history. For commercial jets, it tells you exactly which "physical" plane is coming to pick you up, including its current altitude and speed. For private planes, some owners choose to "block" their tail numbers from public tracking for privacy, though they are still visible to air traffic control and certain advanced hobbyist receivers.