Robtex

Up: 2a01:138::/31
Can't show all results, try to descend to a more specific CIDR
Down left: 2a01:138::/33
Down right: 2a01:138:8000::/33
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
2a01:138:101:1::2	PTR	ns1.pri-dns.de
2a01:138:101:1::3	A+PTR	ns1.ip-exchange.de
2a01:138:101:1::3	A	ns1.pri-dns.de
2a01:138:101:2::2	PTR	ns1.sec-dns.de
2a01:138:101:3::3	A	ns2.ip-exchange.de
2a01:138:101:3::3	A	ns1.sec-dns.de
2a01:138:9000:cb::d06:f00d	A+PTR	mx1.services.cbcdn.com
2a01:138:9000:cb::c0de:b000	A+PTR	midimonster.net
2a01:138:9002:2::54	A	waschbuesch.it
2a01:138:9002:2::54	A	isobm.org
2a01:138:a001:101::111	A	ns9.avira-ns.net
2a01:138:a001:101::111	A	ns1.avira-ns.net
2a01:138:a001:101:1::1	PTR	www.avira.com
2a01:138:a001:101:1::1	A	www.svira.de
2a01:138:a001:101:1::1	A	www.free-av.ru
2a01:138:a001:101:1::2	PTR	www.avira.com
2a01:138:a001:101:1::2	A	www.svira.de
2a01:138:a001:101:1::2	A	www.free-av.ru
2a01:138:b001:10::50be:3616	A	mail.ascofun.cc
2a01:138:b001:10::50be:3616	A	server.ascofun.cc
2a01:138:b001:10::50be:3616	A	lighty.ascofun.cc
2a01:138:b001:13::2:2	PTR	ns2.as-dns.eu