Robtex

Up: 101.99.48.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 101.99.50.0/24
Down right: 101.99.51.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
101.99.50.11	PTR	mx01.danang.gov.vn
101.99.50.19	PTR	static.cmcti.vn
101.99.50.19	A	www.studyabroad.vn
101.99.50.19	A	studyabroad.vn
101.99.50.25	PTR	static.cmcti.vn
101.99.50.25	A	elearning.due.edu.vn
101.99.50.25	A	mail.due.edu.vn
101.99.50.27	PTR	static.cmcti.vn
101.99.50.27	A	elearning.due.edu.vn
101.99.50.27	A	elearning.due.udn.vn
101.99.50.29	PTR	static.cmcti.vn
101.99.50.30	PTR	static.cmcti.vn
101.99.50.30	A	cie.due.udn.vn
101.99.50.30	A	giupbevuihoc.com
101.99.50.34	PTR	static.cmcti.vn
101.99.50.36	A	elearning2.due.edu.vn
101.99.50.38	PTR	static.cmcti.vn
101.99.50.38	A	daotao.due.udn.vn
101.99.50.38	A	daotao.due.edu.vn
101.99.50.50	PTR	static.cmcti.vn
101.99.50.67	PTR	static.cmcti.vn
101.99.50.86	PTR	static.cmcti.vn
101.99.50.86	A	c3.vms.com.vn
101.99.50.97	PTR	static.cmcti.vn
101.99.50.97	A	due.udn.vn
101.99.50.99	PTR	mail.cpc.vn
101.99.50.104	PTR	mail.cpc.vn
101.99.50.145	PTR	static.cmcti.vn
101.99.50.178	PTR	static.cmcti.vn
101.99.50.188	PTR	static.cmcti.vn
101.99.50.188	A	letienmanh.com
101.99.50.198	A	laptoppro.tk
101.99.50.220	PTR	static.cmcti.vn
101.99.50.240	PTR	static.cmcti.vn
101.99.51.24	A	mail.namhoaxuan.net
101.99.51.76	PTR	static.cmcti.vn
101.99.51.80	PTR	static.cmcti.vn
101.99.51.97	PTR	static.cmcti.vn
101.99.51.97	A	ximangsonggianh.com
101.99.51.97	A	mail.ximangsonggianh.com
101.99.51.138	PTR	static.cmcti.vn