Robtex

Up: 83.97.100.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 83.97.100.128/26
Down right: 83.97.100.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
83.97.100.130	PTR	mailserver3.jepponet.dk
83.97.100.131	A	*.kretahus2.dk
83.97.100.132	PTR	mailserver5.jepponet.dk
83.97.100.132	A	mail.adopteret.dk
83.97.100.132	A	mail.larvad.com
83.97.100.134	PTR	mailserver4.jepponet.dk
83.97.100.134	A	post.net-server.dk
83.97.100.135	PTR	plesk100.jepponet.dk
83.97.100.136	PTR	plesk5.jepponet.dk
83.97.100.141	PTR	mailserver9.tnha.dk
83.97.100.146	A	perthorsen.dk
83.97.100.146	A	prolearning.dk
83.97.100.149	A	mail.plan2learn.dk
83.97.100.150	A	mail.humanisterne.dk
83.97.100.151	A	1web2go.net
83.97.100.151	A	humanisterne.dk
83.97.100.154	A	ns1.upaycard.com
83.97.100.155	A	mail.secureupaycard.com
83.97.100.156	A	secureupaycard.com
83.97.100.178	PTR	xl-dating.dk
83.97.100.178	A	nordjyskedating.dk
83.97.100.178	A	*.xldating.se
83.97.100.216	A	mail.itnets.dk
83.97.100.216	A	itnets.dk
83.97.100.226	A	email-spartanslots.info
83.97.100.226	A	mail.email-spartanslots.info