go
shuher.com, philosofu.com, bankomatu.com, lazarevsky.ru, ruscatalog.net and at least five other hosts use this as a nameserver. hostlex.ru is delegated to two nameservers, however both delegated nameservers are missing in the zone. All nameservers are at hostlex.ru themselves. They are on different IP networks.

hostlex.ru
ns records
ns1.hostlex.ru
+   AS?  
+ ---  
ns2.hostlex.ru
+ 67.228.53.222 67.228.0.0/18 AS36351 67.228.53.222-static.reverse.softlayer.com
+ --- 67.228.53.222-static.reverse.softlayer.com
domains using this as nameserver
art-mabila.kiev.ua
bankomatu.com
lazarevsky.ru
nedvijimost.info
officeairing.com
philosofu.com
ruscatalog.net
shuher.com
tochkaotryva.ru
zigulineauto.ru
nameservers missing in zone
ns1.hostlex.ru
ns2.hostlex.ru
used as nameserver but missing in zone
art-mabila.kiev.ua
lazarevsky.ru
nedvijimost.info
zigulineauto.ru