Robtex

Up: 88.151.50.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 88.151.50.0/25
Down right: 88.151.50.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
88.151.50.3	PTR	net50-3.kaupthing.net
88.151.50.4	PTR	net50-4.kaupthing.net
88.151.50.5	PTR	net50-5.kaupthing.net
88.151.50.8	PTR	net50-8.kaupthing.net
88.151.50.24	A	mx1.arionbanki.is
88.151.50.24	A	mx1.kaupthing.com
88.151.50.24	A	mx1-is.bi.is
88.151.50.43	PTR	net50-43.kaupthing.net
88.151.50.44	PTR	net50-44.kaupthing.net
88.151.50.48	PTR	net50-48.kaupthing.net
88.151.50.54	PTR	net50-54.kaupthing.net
88.151.50.60	PTR	net50-60.kaupthing.net
88.151.50.65	PTR	net50-65.kaupthing.net
88.151.50.67	PTR	net50-67.kaupthing.net
88.151.50.85	PTR	net50-85.kaupthing.net
88.151.50.86	PTR	net50-86.kaupthing.net
88.151.50.87	A+PTR	netbanki-test.arionbanki.is
88.151.50.97	PTR	net50-97.kaupthing.net
88.151.50.98	PTR	net50-98.kaupthing.net
88.151.50.99	PTR	net50-99.kaupthing.net
88.151.50.100	A+PTR	ns2.arionbanki.is
88.151.50.100	A	ns2.bi.is
88.151.50.110	A+PTR	autodiscover.arionbanki.is
88.151.50.110	A+PTR	mail.arionbanki.is
88.151.50.110	A+PTR	postur.arionbanki.is
88.151.50.114	PTR	net50-114.kaupthing.net
88.151.50.115	PTR	net50-115.kaupthing.net
88.151.50.117	PTR	net50-117.arionbanki.is
88.151.50.117	A	wwwv2.arionbanki.is
88.151.50.117	A	arsskyrsla2014.arionbanki.is
88.151.50.119	PTR	net50-119.arionbanki.is
88.151.50.119	A	arionbanki.biz
88.151.50.119	A	arionbank.info
88.151.50.120	PTR	net50-120.kaupthing.net
88.151.50.120	A	support.arionbanki.is
88.151.50.121	PTR	net50-121.kaupthing.net
88.151.50.127	A+PTR	service.arionbanki.is
88.151.50.133	PTR	net50-133.kaupthing.net
88.151.50.137	PTR	net50-137.kaupthing.net
88.151.50.141	PTR	net50-141.kaupthing.net
88.151.50.143	PTR	net50-143.kaupthing.net
88.151.50.145	PTR	net50-145.kaupthing.net
88.151.50.147	PTR	arsskyrsla2014.arionbanki.is
88.151.50.147	PTR	arsskyrsla2015.arionbanki.is
88.151.50.147	PTR	gjaldeyrir.arionbanki.is
88.151.50.148	PTR	net50-148.kaupthing.net
88.151.50.148	A	netbanki.arionbanki.is
88.151.50.148	A	static.arionbanki.is
88.151.50.149	A	arionbanki.biz
88.151.50.149	A	arionbank.se
88.151.50.149	A	efia.is
88.151.50.152	PTR	net50-152.kaupthing.net
88.151.50.154	PTR	net50-154.kaupthing.net
88.151.50.155	A+PTR	mx01.arionbanki.is
88.151.50.156	A+PTR	mx02.arionbanki.is
88.151.50.162	PTR	net50-162.kaupthing.net
88.151.50.166	PTR	net50-166.kaupthing.net
88.151.50.168	PTR	net50-168.kaupthing.net
88.151.50.173	PTR	net50-173.kaupthing.net
88.151.50.176	PTR	net50-176.kaupthing.net
88.151.50.178	PTR	net50-178.kaupthing.net
88.151.50.179	PTR	net50-179.kaupthing.net
88.151.50.180	PTR	net50-180.kaupthing.net
88.151.50.180	A	magr.arionbanki.is
88.151.50.182	PTR	net50-182.kaupthing.net
88.151.50.183	PTR	net50-183.kaupthing.net
88.151.50.195	PTR	net50-195.kaupthing.net
88.151.50.196	PTR	net50-196.kaupthing.net
88.151.50.200	PTR	net50-200.kaupthing.net
88.151.50.209	PTR	net50-209.kaupthing.net
88.151.50.215	PTR	net50-215.kaupthing.net
88.151.50.219	PTR	net50-219.kaupthing.net
88.151.50.224	PTR	net50-224.arionbanki.is
88.151.50.227	PTR	net50-227.kaupthing.net
88.151.50.229	PTR	net50-229.kaupthing.net
88.151.50.231	PTR	net50-231.kaupthing.net
88.151.50.237	PTR	net50-237.kaupthing.net
88.151.50.240	PTR	net50-240.kaupthing.net
88.151.50.241	PTR	net50-241.kaupthing.net
88.151.50.242	PTR	net50-242.kaupthing.net
88.151.50.244	PTR	net50-244.kaupthing.net
88.151.50.245	PTR	net50-245.kaupthing.net
88.151.50.246	PTR	net50-246.kaupthing.net
88.151.50.249	PTR	net50-249.kaupthing.net
88.151.50.252	PTR	net50-252.kaupthing.net
88.151.50.255	PTR	net50-255.kaupthing.net