Robtex

Up: 81.21.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 81.21.48.0/23
Down right: 81.21.50.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.21.48.19	A+PTR	ins1.inet.net.sa
81.21.48.19	A	jed.inet.net.sa
81.21.48.19	A	ryd.inet.net.sa
81.21.48.20	A+PTR	ins2.inet.net.sa
81.21.48.20	A	jed.inet.net.sa
81.21.48.20	A	ryd.inet.net.sa
81.21.48.21	PTR	ins3.inet.net.sa
81.21.48.21	A	jed.inet.net.sa
81.21.48.21	A	ryd.inet.net.sa
81.21.48.22	PTR	mail.inet.net.sa
81.21.48.23	PTR	mail1.inet.net.sa
81.21.48.24	A+PTR	mail2.inet.net.sa
81.21.48.26	PTR	catchall.ispan.net.sa
81.21.48.26	A	ispan.com.sa
81.21.48.26	A	repportal.ispan.com.sa
81.21.48.35	A	proxy1.inet.net.sa
81.21.48.36	A	proxy2.inet.net.sa
81.21.48.37	A+PTR	proxy.inet.net.sa
81.21.48.51	A	csacs.inet.net.sa
81.21.48.52	A	console.inet.net.sa
81.21.48.52	A	xconsole.inet.net.sa
81.21.48.53	A	csacs2.inet.net.sa
81.21.48.55	A	ispdbsrv.inet.net.sa
81.21.48.56	A	ispappsrv.inet.net.sa
81.21.48.66	A	aconcagua.inet.net.sa
81.21.48.80	A+PTR	concord.inet.net.sa
81.21.48.81	A	smarts.inet.net.sa
81.21.48.82	A	vap.inet.net.sa
81.21.48.83	A+PTR	vdc.inet.net.sa
81.21.48.84	A	bcreporter.inet.net.sa
81.21.48.85	A	pacific.inet.net.sa
81.21.48.94	A	atlantic.inet.net.sa
81.21.48.132	A	webgw.inet.net.sa
81.21.48.148	A+PTR	mx1.inet.net.sa