Robtex

Up: 91.198.144.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 91.198.144.0/26
Down right: 91.198.144.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.198.144.11	A+PTR	mail1.skagennet.dk
91.198.144.12	A+PTR	mail2.skagennet.dk
91.198.144.21	PTR	smtp2.skagennet.dk
91.198.144.22	PTR	smtp2.skagennet.dk
91.198.144.22	A	smtp.skagennet.dk
91.198.144.31	PTR	31-144-198-91.ptr.skagennet.dk
91.198.144.41	PTR	web.skagennet.dk
91.198.144.41	A+PTR	skagen-net.dk
91.198.144.42	A	78.in-addr.arpa.skagennet.dk
91.198.144.42	A	ip-64-10.skagennet.dk
91.198.144.42	A	web2.skagennet.dk
91.198.144.121	A	skanet.dk