According to a source on Twitter, the Jordanian F16 which came down in ISIL territory was "149" which served with the Belgian Air Force as FA-78 until 2009. Click the picture below to see the Belgian Wings' special feature on the Jordanian Falcons:
Royal Jordanian Air Force F-16AM "149"leaving Kleine Brogel airbase on 19 March 2009

F-16A FA-78 at Kleine Brogel airbase on 29 April 1987
Daniel Brackx