Robtex

Up: 192.121.12.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.121.13.0/25
Down right: 192.121.13.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.121.13.5	A+PTR	mirror-01.mainloop.net
192.121.13.5	A	db.se.clamav.net
192.121.13.5	A	ns4.geoip.clamav.net
192.121.13.9	PTR	dns-manager.mainloop.net
192.121.13.9	A	mail.viatel.se
192.121.13.9	A	reforceinternational.com
192.121.13.11	PTR	dns-02.mainloop.net
192.121.13.34	A	nat-office-wlan.astrakan.se
192.121.13.35	A	astrakan1.astrakan.se
192.121.13.36	A+PTR	astrakan-sql-01.astrakan.se
192.121.13.36	A	sssk.eu
192.121.13.52	A+PTR	pluto.intranet.mainloop.net
192.121.13.52	A	intranet.mainloop.net
192.121.13.59	PTR	smtp-relay-02.mainloop.net
192.121.13.60	A+PTR	smtp-relay-01.mainloop.net
192.121.13.61	A	smtp-relay-02.mainloop.net
192.121.13.68	A+PTR	enectoweb-01-vm.mainloop.net
192.121.13.69	A	www-hotelroom4.mainloop.net
192.121.13.70	A+PTR	hotelroom7.mainloop.net
192.121.13.70	A	hkraft.com
192.121.13.70	A	enecto.se
192.121.13.72	A	rodenstock.se
192.121.13.73	PTR	hotelroom5.mainloop.net
192.121.13.73	A	www.myhrgren.se
192.121.13.73	A	mail.nystart.se
192.121.13.74	PTR	hotelroom6.mainloop.net
192.121.13.74	A	triangelresor.se
192.121.13.74	A	attollo.se
192.121.13.75	A	www.viatel.se
192.121.13.84	A+PTR	minecraft.rinaldo.nu
192.121.13.98	PTR	chsa.tmicro.se
192.121.13.162	A	nat-office.saltsea.net
192.121.13.163	A	nat-office.mainloop.net
192.121.13.166	A	hotelroom2.mainloop.net
192.121.13.177	PTR	colo-gw.mainloop.net
192.121.13.178	PTR	redbox.oa5.com
192.121.13.186	A+PTR	sfei03p.fouredge.se
192.121.13.186	A	ns-03.fouredge.se
192.121.13.187	A	mail.coresec.se
192.121.13.188	A	ive.coresec.se
192.121.13.225	PTR	router-carp.mainloop.net