Robtex

Up: 220.240.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 220.240.20.0/23
Down right: 220.240.22.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
220.240.21.2	PTR	2.21.240.220.static.dsl.rns02-kent-syd.comindico.com.au
220.240.22.80	PTR	220-240-22-80.static.tpgi.com.au
220.240.22.115	A	mx01.jonlup.ro
220.240.22.115	A	mx02.jonlup.ro
220.240.22.115	A	jonlup.ro