Robtex

Up: 100.42.30.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 100.42.31.0/25
Down right: 100.42.31.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
100.42.31.3	PTR	ms3.tr1tonmail.com
100.42.31.155	PTR	www5.paperfour.net
100.42.31.155	A	teampcb.com
100.42.31.155	A	mail.nrdsi.com
100.42.31.162	PTR	becks.tareducate.com
100.42.31.162	A	*.unixlocator.com
100.42.31.162	A	unixlocator.com
100.42.31.169	PTR	cati.landevelop.com
100.42.31.169	A	maelcover.com