It is quite elliptical. Right now the second stage is in GTO, with an apogee of 7000km and perigee (presumably) of ~200 or so. When it arrives at apogee, it'll

It is quite elliptical. Right now the second stage is in GTO, with an apogee of 7000km and perigee (presumably) of ~200 or so. When it arrives at apogee, it'll reignite and go hyperbolic, onto a trajectory that escapes the Earth's SOI - then it will no longer be in Earth orbit.