The reverse of IP range 137.74.0.0 are not working.
Cause: The IP range 137.74.0.0/16 was transfered from APNIC to RIPE. During this transfer, the reverse DNS zone (74.137.0.0.in-addr.arpa) should have been delegated to RIPE.
It seems that this process wasn't fully done.
We are working with RIPE to finalize it.
Update(s):
Date: 2016-08-30 08:08:20 UTC Reverses are now working fine.