Robtex

Up: 203.133.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.133.72.0/23
Down right: 203.133.74.0/23
(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
203.133.72.16	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
203.133.72.24	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
203.133.73.29	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	PTR	host-203-133-73-102.ip.kbtelecom.net
203.133.73.102	A	balauo.com
203.133.73.102	A	resucl.com
203.133.74.3	A+PTR	host-203-133-74-3.ip.kbtelecom.net
203.133.74.5	A	apnk.u16888.com
203.133.74.5	A	apnk.beer000.com
203.133.74.5	A	apnk.indukbola.com
203.133.74.6	PTR	host-203-133-74-6.ip.kbtelecom.net
203.133.74.8	A	ddnk.u16888.com
203.133.74.8	A	ddnk.camquit.com
203.133.74.8	A	ddnk.e16877.com
203.133.74.43	PTR	host-203-133-74-43.ip.kbtelecom.net
203.133.74.52	PTR	host-203-133-74-52.ip.kbtelecom.net
203.133.74.52	A	wap4.mabetsika.com
203.133.74.52	A	wap4.sbobet.com
203.133.74.53	A	qxga.currybread.com
203.133.74.53	A	qxga.hardlouis.com
203.133.74.57	PTR	host-203-133-74-57.ip.kbtelecom.net
203.133.74.62	A+PTR	host-203-133-74-62.ip.kbtelecom.net
203.133.74.73	A+PTR	host-203-133-74-73.ip.kbtelecom.net
203.133.74.88	A	host-203-133-74-88.ip.kbtelecom.net
203.133.74.94	A	host-203-133-74-94.ip.kbtelecom.net
203.133.74.101	PTR	host-203-133-74-101.ip.kbtelecom.net
203.133.74.111	A	host-203-133-74-111.ip.kbtelecom.net
203.133.74.115	PTR	host-203-133-74-115.ip.kbtelecom.net
203.133.74.136	A+PTR	host-203-133-74-136.ip.kbtelecom.net
203.133.74.142	A+PTR	host-203-133-74-142.ip.kbtelecom.net
203.133.74.144	A+PTR	host-203-133-74-144.ip.kbtelecom.net
203.133.74.159	PTR	host-203-133-74-159.ip.kbtelecom.net
203.133.74.171	PTR	host-203-133-74-171.ip.kbtelecom.net
203.133.74.190	PTR	host-203-133-74-190.ip.kbtelecom.net
203.133.74.195	PTR	host-203-133-74-195.ip.kbtelecom.net
203.133.74.198	A	host-203-133-74-198.ip.kbtelecom.net
203.133.74.199	A	host-203-133-74-199.ip.kbtelecom.net
203.133.74.202	A+PTR	host-203-133-74-202.ip.kbtelecom.net
203.133.74.214	A	fzgm.mabetsika.com
203.133.74.226	A+PTR	host-203-133-74-226.ip.kbtelecom.net
203.133.74.239	A+PTR	host-203-133-74-239.ip.kbtelecom.net
203.133.75.29	PTR	host-203-133-75-29.ip.kbtelecom.net