A quick check of Airfleets.net shows that ID 34671and ID 33434 of N717AN, American Airlines, B 777-323ER does exist:
American Airlines N717AN (Boeing 777 - MSN 31543) | Airfleets aviation
It's first flight being on 17/Oct/2012.
Not sure why you describe this as a Fantasy model? I'm guessing you mean the colors are Fantasy, not the plane, please in future share all the information that leads you to make the statement. Sadly I'm not up to date with EVERY airline in the world! - shoot me now!