Robtex

Up: 203.133.72.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 203.133.72.0/24
Down right: 203.133.73.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.133.72.1	A	host-203-133-72-1.ip.kbtelecom.net
203.133.72.9	PTR	host-203-133-72-9.ip.kbtelecom.net
203.133.72.12	A	r1---sn-3cu-3iie.googlevideo.com
203.133.72.13	A	r2---sn-3cu-3iie.googlevideo.com
203.133.72.13	A	r2.sn-3cu-3iie.googlevideo.com
203.133.72.14	A	r3.sn-3cu-3iie.googlevideo.com
203.133.72.14	A	r3---sn-3cu-3iie.googlevideo.com
203.133.72.15	A	r4---sn-3cu-3iie.c.pack.google.com
203.133.72.15	A	r4.sn-3cu-3iie.googlevideo.com
203.133.72.16	A	r5---sn-3cu-3iie.googlevideo.com
203.133.72.17	A	r6.sn-3cu-3iie.googlevideo.com
203.133.72.17	A	r6---sn-3cu-3iie.googlevideo.com
203.133.72.18	PTR	host-203-133-72-18.ip.kbtelecom.net
203.133.72.18	A	r7.sn-3cu-3iie.googlevideo.com
203.133.72.18	A	r7---sn-3cu-3iie.googlevideo.com
203.133.72.19	A	r8---sn-3cu-3iie.googlevideo.com
203.133.72.24	A+PTR	host-203-133-72-24.ip.kbtelecom.net
203.133.72.41	A+PTR	host-203-133-72-41.ip.kbtelecom.net
203.133.72.82	PTR	host-203-133-72-82.ip.kbtelecom.net
203.133.72.116	A	host-203-133-72-116.ip.kbtelecom.net
203.133.72.117	A	host-203-133-72-117.ip.kbtelecom.net
203.133.72.131	A	host-203-133-72-131.ip.kbtelecom.net
203.133.72.140	A	r1.sn-3cu-3iil.googlevideo.com
203.133.72.142	A	r3.sn-3cu-3iil.googlevideo.com
203.133.72.145	A	r6.sn-3cu-3iil.googlevideo.com
203.133.73.1	PTR	host-203-133-73-1.ip.kbtelecom.net
203.133.73.1	A	www.playsbo.com
203.133.73.1	A	www.currybread.com
203.133.73.2	PTR	host-203-133-73-2.ip.kbtelecom.net
203.133.73.2	A	www.pic5678.com
203.133.73.2	A	www.sukamain.com
203.133.73.29	A+PTR	host-203-133-73-29.ip.kbtelecom.net
203.133.73.31	A+PTR	host-203-133-73-31.ip.kbtelecom.net
203.133.73.35	A	host-203-133-73-35.ip.kbtelecom.net
203.133.73.40	PTR	host-203-133-73-40.ip.kbtelecom.net
203.133.73.40	A	aaa11111.5166.info
203.133.73.42	A	host-203-133-73-42.ip.kbtelecom.net
203.133.73.50	A+PTR	host-203-133-73-50.ip.kbtelecom.net
203.133.73.50	A	sbobet.gratis
203.133.73.72	PTR	host-203-133-73-72.ip.kbtelecom.net
203.133.73.101	PTR	host-203-133-73-101.ip.kbtelecom.net
203.133.73.101	A	ceocus.com
203.133.73.101	A	balauo.com
203.133.73.102	A+PTR	host-203-133-73-102.ip.kbtelecom.net
203.133.73.102	A	balauo.com
203.133.73.102	A	resucl.com