Robtex

Up: 212.26.18.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 212.26.18.0/25
Down right: 212.26.18.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.26.18.2	A+PTR	webmail.isu.net.sa
212.26.18.3	A+PTR	ns1.isu.net.sa
212.26.18.3	A	i.nic.net.sa
212.26.18.4	A	mx4.isu.net.sa
212.26.18.5	PTR	academic.edu.sa
212.26.18.5	PTR	internet.edu.sa
212.26.18.5	PTR	news.edu.sa
212.26.18.6	A+PTR	ssl-vpn.isu.net.sa
212.26.18.9	A+PTR	boe-daif.isu.net.sa
212.26.18.15	A	www.khabar.edu.sa
212.26.18.18	A+PTR	mx3.isu.net.sa
212.26.18.23	A+PTR	ns3.isu.net.sa
212.26.18.28	A+PTR	mozilla.isu.net.sa
212.26.18.29	A+PTR	mx2.isu.net.sa
212.26.18.29	A+PTR	relay.isu.net.sa
212.26.18.33	PTR	tarjem.edu.sa
212.26.18.33	A+PTR	tarjim.edu.sa
212.26.18.33	A+PTR	tarjem.net.sa
212.26.18.36	A+PTR	sarinet.edu.sa
212.26.18.36	A+PTR	sarinet.net.sa
212.26.18.36	A+PTR	sarinet.org.sa
212.26.18.37	A+PTR	kacst-cri-daif.isu.net.sa
212.26.18.40	A+PTR	ruh-eds1.isu.net.sa
212.26.18.41	A+PTR	time1.isu.net.sa
212.26.18.41	A	sa.pool.ntp.org
212.26.18.43	A+PTR	time2.isu.net.sa
212.26.18.43	A	sa.pool.ntp.org
212.26.18.43	A	0.asia.pool.ntp.org
212.26.18.47	A+PTR	storage.isu.net.sa
212.26.18.48	A+PTR	mozilla.isu.net.sa
212.26.18.49	A+PTR	mu-daif.isu.net.sa
212.26.18.50	A+PTR	ruh-eds2.isu.net.sa
212.26.18.51	A	news.edu.sa
212.26.18.55	A+PTR	kau1-daif.isu.net.sa
212.26.18.57	A+PTR	kau2-daif.isu.net.sa
212.26.18.58	A+PTR	support2.isu.net.sa
212.26.18.117	A	nicsrv.nic.net.sa
212.26.18.120	A	mail.isu.net.sa
212.26.18.178	A+PTR	ruh-zmail1.isu.net.sa