The NOTAMS are genuine
The NOTAM is genuine.......my company flew that route and I have been able to download the archived briefing pack. The FIR brief lists a whole range of coordinates and I plotted them. Surprise, surprise, they plot an area directly above the conflict zone. And there was NO upper limit specified.
MAS ran the gauntlet and they paid the price. This shows a wide spread failure in their management. Their mechanisms failed to identify a conflict area, and the pilots didn't recognize the RZ......perhaps because they got given a massive briefing pack which contained masses of superfluous information due to lack of filtration.