On which platform is built this forum?

As the object says, on which platform is built NUlledbb.com?

If you are asking what type of host they use, it is probably a bulletproof host that is hosted in a country that allows most activity on it. But I'm just guessing, it could be hosted on a normal host like OVH.

I dont mean host platform.
I mean which platform they use to power the forum, for example phpBB or Vbullettin or IPB.

There isn't a sign nowhere, so i was wondering...

They're using MyBB but have a self made Theme so you wouldn't expect that