Robtex

Up: 101.99.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 101.99.21.0/25
Down right: 101.99.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
101.99.21.0	PTR	baoviet.com.vn
101.99.21.1	PTR	baoviet.com.vn
101.99.21.2	PTR	baoviet.com.vn
101.99.21.2	A	portal.vpn.baoviet.com.vn
101.99.21.3	PTR	baoviet.com.vn
101.99.21.4	PTR	baoviet.com.vn
101.99.21.5	PTR	baoviet.com.vn
101.99.21.5	A	bvdns-int02.baovietnhantho.com.vn
101.99.21.5	A	vpn.baoviet.com.vn
101.99.21.6	PTR	baoviet.com.vn
101.99.21.7	PTR	baoviet.com.vn
101.99.21.7	A	smtp16.baoviet.com.vn
101.99.21.8	PTR	baoviet.com.vn
101.99.21.9	PTR	baoviet.com.vn
101.99.21.9	A	passthru1.baoviet.com.vn
101.99.21.10	PTR	baoviet.com.vn
101.99.21.10	A	passthru2.baoviet.com.vn
101.99.21.11	A+PTR	smtp12.baoviet.com.vn
101.99.21.12	PTR	baoviet.com.vn
101.99.21.13	PTR	baoviet.com.vn
101.99.21.14	PTR	baoviet.com.vn
101.99.21.15	A+PTR	baoviet.com.vn
101.99.21.15	A	www.baoviet.com.vn
101.99.21.15	A	www.wip.baoviet.vn
101.99.21.16	PTR	baoviet.com.vn
101.99.21.16	A	www.baovietsecurities.com.vn
101.99.21.16	A	baovietsecurities.com.vn
101.99.21.17	PTR	baoviet.com.vn
101.99.21.17	A	wwwbvscnew.wip.baoviet.vn
101.99.21.17	A	bvsc.com.vn
101.99.21.19	A	onlinesupport.baoviet.com.vn
101.99.21.20	PTR	baoviet.com.vn
101.99.21.21	PTR	baoviet.com.vn
101.99.21.22	PTR	baoviet.com.vn
101.99.21.22	A	baovietnhantho.com.vn
101.99.21.23	PTR	baoviet.com.vn
101.99.21.24	PTR	baoviet.com.vn
101.99.21.26	PTR	baoviet.com.vn
101.99.21.27	PTR	baoviet.com.vn
101.99.21.27	A	baovietnhantho.com.vn
101.99.21.27	A	bvnt.wip.baoviet.vn
101.99.21.28	PTR	baoviet.com.vn
101.99.21.29	PTR	baoviet.com.vn
101.99.21.30	PTR	baoviet.com.vn
101.99.21.31	PTR	baoviet.com.vn
101.99.21.32	PTR	baoviet.com.vn
101.99.21.32	A	bvdr.baoviet.com.vn
101.99.21.33	PTR	baoviet.com.vn
101.99.21.34	PTR	baoviet.com.vn
101.99.21.35	PTR	baoviet.com.vn
101.99.21.35	A	innotream.bvsc.com.vn
101.99.21.36	PTR	baoviet.com.vn
101.99.21.37	PTR	baoviet.com.vn
101.99.21.38	PTR	baoviet.com.vn
101.99.21.39	PTR	baoviet.com.vn
101.99.21.40	PTR	baoviet.com.vn
101.99.21.40	A	gycbh.baovietnhantho.com.vn
101.99.21.41	PTR	baoviet.com.vn
101.99.21.42	PTR	baoviet.com.vn
101.99.21.43	PTR	baoviet.com.vn
101.99.21.43	A	www.baovietsecurities.net
101.99.21.44	PTR	baoviet.com.vn
101.99.21.44	A	epos.baovietnhantho.com.vn
101.99.21.44	A	mybvlife.baovietnhantho.com.vn
101.99.21.45	PTR	baoviet.com.vn
101.99.21.45	A	bhbvtd.wip.baoviet.vn
101.99.21.45	A	baovietonline.com.vn
101.99.21.46	PTR	baoviet.com.vn
101.99.21.47	PTR	baoviet.com.vn
101.99.21.48	PTR	baoviet.com.vn
101.99.21.49	PTR	baoviet.com.vn
101.99.21.49	A	baovietfund.com.vn
101.99.21.51	A	tvv.baovietnhantho.com.vn
101.99.21.53	PTR	baoviet.com.vn
101.99.21.54	PTR	baoviet.com.vn
101.99.21.55	PTR	baoviet.com.vn
101.99.21.56	PTR	baoviet.com.vn
101.99.21.57	PTR	baoviet.com.vn
101.99.21.58	PTR	baoviet.com.vn
101.99.21.59	PTR	baoviet.com.vn
101.99.21.60	PTR	baoviet.com.vn
101.99.21.61	PTR	baoviet.com.vn
101.99.21.62	PTR	baoviet.com.vn
101.99.21.63	PTR	baoviet.com.vn
101.99.21.64	PTR	baoviet.com.vn
101.99.21.78	PTR	static.cmcti.vn
101.99.21.78	A	www.vqs.vn
101.99.21.91	A+PTR	mail.archives.gov.vn
101.99.21.92	PTR	mail.archives.gov.vn
101.99.21.92	A	web.archives.gov.vn
101.99.21.92	A	archives.gov.vn
101.99.21.93	A	www1.archives.gov.vn
101.99.21.95	A	dms.luutru.gov.vn
101.99.21.96	A+PTR	luutru.gov.vn
101.99.21.96	A	mail.luutru.gov.vn
101.99.21.96	A	luutruvn.gov.vn
101.99.21.114	PTR	static.cmcti.vn
101.99.21.114	A	lc2.abs.vn
101.99.21.117	PTR	static.cmcti.vn
101.99.21.117	A	itrade.wip.abs.vn
101.99.21.117	A	gdtt.abs.vn
101.99.21.122	PTR	mail.abs.vn
101.99.21.122	A	bmail.abs.vn
101.99.21.124	A+PTR	ns2.abs.vn
101.99.21.124	A	www.abs.vn
101.99.21.124	A	www.wip.abs.vn
101.99.21.125	PTR	static.cmcti.vn
101.99.21.125	A	app.wip.abs.vn
101.99.21.125	A	absweb.abs.vn
101.99.21.132	PTR	static.cmcti.vn
101.99.21.132	A	*.ginggong.com
101.99.21.132	A	ginggong.com
101.99.21.169	PTR	static.cmcti.vn
101.99.21.169	A	dr-mailgw.msb.com.vn
101.99.21.178	PTR	static.cmcti.vn
101.99.21.202	PTR	mail.pvc.vn
101.99.21.213	PTR	static.cmcti.vn
101.99.21.214	PTR	static.cmcti.vn
101.99.21.214	A	mail.vrbank.com.vn
101.99.21.216	A+PTR	mail2.vrbank.com.vn
101.99.21.241	PTR	static.cmcti.vn
101.99.21.241	A	www.pjico.com.vn
101.99.21.241	A	pjico.com.vn