Belgium publishes it in AIC Nr 03/2013:
The Schengen Area, within which no restrictions to air travel apply, currently consists of 26 countries:
( list )
Flights arriving from any other country shall only use the official border crossing points when landing in Belgium. Likewise, flights departing to any country outside the Schengen Area shall take off only from the official border crossing points.
The official border crossing points are EBAW, EBBR, EBCI, EBKT, EBLG and EBOS.