Robtex

Up: 199.167.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 199.167.21.0/25
Down right: 199.167.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.167.21.4	PTR	ns1.ahsv.net
199.167.21.4	A	ns1.wendyscruelty.com
199.167.21.4	A	ns1.astuteinternet.com
199.167.21.5	PTR	ns3.ahsv.net
199.167.21.5	A	ns2.pollomcmiseria.com
199.167.21.5	A	ns2.a2bfiber.com