Robtex

Up: 210.18.28.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 210.18.28.0/25
Down right: 210.18.28.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.18.28.42	A+PTR	210.18.28.42.sify.net
210.18.28.43	A	mail.sdilusa.com
210.18.28.43	A	mail.datainc.in
210.18.28.43	A	mail.dataincindia.com
210.18.28.60	PTR	210.18.28.60.sify.net
210.18.28.61	A+PTR	210.18.28.61.sify.net
210.18.28.65	PTR	210.18.28.65.sify.net
210.18.28.174	A	210.18.28.174.sify.net