Robtex

Up: 212.33.4.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 212.33.4.0/24
Down right: 212.33.5.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.33.4.18	A+PTR	smtp.gk-start.ru
212.33.4.18	A	ns.gk-start.ru
212.33.4.62	PTR	mail.vedotek.ru
212.33.4.70	PTR	mx.gcsa.ru
212.33.4.74	PTR	mail.moesk.ru
212.33.4.84	PTR	c84180.globus-telecom.com
212.33.4.194	A+PTR	mxs.vccu.ru
212.33.4.194	A+PTR	mxs.vancont.ru
212.33.4.194	A	vc.vancont.ru
212.33.4.254	PTR	c254180.globus-telecom.com
212.33.5.49	PTR	nsm.arbitr.ru
212.33.5.84	PTR	c84180.globus-telecom.com
212.33.5.250	A+PTR	mail.estatet.ru
212.33.5.250	A	mail.2238888.ru
212.33.5.250	A	globase.ru