The Hall of Shame has been updated with a list of known IP addresses with PTR records going to no-reverse-dns-configured.com.
I have found the following IP addresses in my syslog with PTR records going to no-reverse-dns-configured.com. 126.96.36.199 was previously discussed due to the sheer volume of attacks.
All IP addresses are managed by Quasi Networks LTD, per the RIPE Database lookup.
|188.8.131.52||11||TCP & UDP|