Robtex

Up: 213.247.102.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 213.247.102.0/25
Down right: 213.247.102.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.247.102.150	PTR	rt102bb247-213-150.routit.net
213.247.102.185	PTR	rt102bb247-213-185.routit.net
213.247.102.224	PTR	rt102bb247-213-224.routit.net
213.247.102.224	A	smtp.sluban.be
213.247.102.224	A	smtp.sluban.eu