Robtex

Up: 123.31.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 123.31.32.0/22
Down right: 123.31.36.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.31.32.9	PTR	localhost
123.31.32.44	A	yenbai.gov.vn
123.31.32.130	A	daily.vnshop.vn
123.31.32.134	A	admin-hddt2019.phongvu.vn
123.31.32.144	PTR	static.vnpt.vn
123.31.32.144	A	wifi.phongvu.vn
123.31.32.150	A	dev-tracking.teko.vn
123.31.32.162	A	gcafe.teko.vn
123.31.32.164	A	analytics.teko.vn
123.31.32.170	PTR	localhost
123.31.32.170	A	phongvu.vn
123.31.32.170	A	img1-cdn.phongvu.vn
123.31.32.194	A	file.services.teko.vn
123.31.32.206	A	congdong.phongvu.vn
123.31.32.208	A	crm.phongvu.vn
123.31.32.219	A	api-wms.phongvu.vn
123.31.33.13	A	www.benhvienyhct-phcnkhanhhoa.com.vn
123.31.33.13	A	achaufood.com.vn
123.31.33.13	A	luatsudaothanhtuan.com
123.31.34.1	PTR	localhost
123.31.34.16	PTR	localhost
123.31.34.17	PTR	localhost
123.31.34.18	PTR	localhost
123.31.34.41	PTR	localhost
123.31.34.73	PTR	localhost
123.31.34.74	PTR	localhost
123.31.34.75	PTR	localhost
123.31.34.121	PTR	localhost
123.31.34.136	PTR	localhost
123.31.34.144	PTR	localhost
123.31.34.144	A	tlsoft.info
123.31.34.170	PTR	localhost
123.31.34.179	PTR	localhost
123.31.34.182	A	samprp.net
123.31.34.186	PTR	localhost
123.31.34.192	PTR	localhost
123.31.34.201	PTR	localhost
123.31.34.216	PTR	localhost
123.31.34.218	PTR	localhost
123.31.34.219	PTR	localhost
123.31.34.236	A	thdmediaglobal.com
123.31.34.240	PTR	localhost
123.31.35.24	PTR	localhost
123.31.35.40	PTR	localhost
123.31.35.55	A	secureidcmb.vnptdata.vn
123.31.35.57	PTR	localhost
123.31.35.57	A	secureidcmb.vnptdata.vn
123.31.35.83	A	minevi.com
123.31.35.83	A	mine247.net
123.31.35.128	PTR	localhost
123.31.35.129	PTR	localhost
123.31.35.129	A	beem.vn
123.31.36.3	PTR	localhost
123.31.36.3	A	vnptpay.vn
123.31.36.3	A	vinaphone.vnptpay.vn
123.31.36.4	A	api.vnptpay.vn
123.31.36.5	A	admin.vnptpay.vn
123.31.36.18	A	tvhay.vn
123.31.36.18	A	www.tvhay.vn
123.31.36.24	PTR	localhost
123.31.36.24	A	ceeme.vn
123.31.36.33	A	www.vtruyen.com.vn
123.31.36.33	A	vtruyen.com.vn
123.31.36.34	A	www.vascloud.com.vn
123.31.36.42	A	www.myshopbrand.vn
123.31.36.43	PTR	localhost
123.31.36.43	A	myenglish.com.vn
123.31.36.45	A	ads.vascloud.com.vn
123.31.36.66	A	www.2friends.com.vn
123.31.36.66	A	2friends.com.vn
123.31.36.69	A	chinese.baoquangninh.com.vn
123.31.36.69	A	english.baoquangninh.com.vn
123.31.36.69	A	qtv.vn
123.31.36.75	PTR	localhost
123.31.36.75	A	baohagiang.vn
123.31.36.75	A	baohungyen.org.vn
123.31.36.101	A	www.mcover.vn
123.31.36.101	A	mcover.vn
123.31.36.102	A	www.myenglish.com.vn
123.31.36.102	A	vas.myenglish.com.vn
123.31.36.118	A	www.baodanang.vn
123.31.36.118	A	www.qtv.vn
123.31.36.118	A	qtv.vn
123.31.36.121	A	www.myhomework.vn
123.31.36.131	A	bvdkbuudien.com.vn
123.31.36.137	A	phim18h.vn
123.31.36.147	A	www.vnptapi.com
123.31.36.150	A	store.vinaphone.vn
123.31.36.156	A	trungngay1ty.vn
123.31.36.161	A	m.vnptpay.vn
123.31.36.170	PTR	localhost
123.31.36.170	A	api-myvnpt.vnpt.vn
123.31.36.171	A	image-myvnpt.vnptvas.com
123.31.36.173	A	vnpt.vn
123.31.36.183	A	vn.alome.vn
123.31.36.235	PTR	localhost
123.31.36.235	A	vinaphone.com.vn
123.31.36.235	A	vnpt.com.vn
123.31.38.72	PTR	static.vnpt.vn
123.31.38.73	PTR	static.vnpt.vn
123.31.38.73	A	jxdaiviet.mobi
123.31.38.73	A	mail.jxdaiviet.mobi
123.31.38.80	PTR	localhost
123.31.38.80	A	docbavolam.mobi
123.31.38.80	A	mail.docbavolam.mobi
123.31.38.85	A	www.muvn-free.com
123.31.38.86	A	muvuapkvn.com
123.31.38.91	PTR	static.vnpt.vn
123.31.38.91	A	mudeploan.com
123.31.38.95	A	tieungaovosong.org
123.31.38.97	PTR	static.vnpt.vn
123.31.38.97	A	www.mu-haiduong.com
123.31.38.98	PTR	localhost
123.31.38.98	A	muvietnamsv.com
123.31.38.100	A	munhansu.com
123.31.38.102	A	mu-keeppont.com
123.31.38.114	PTR	static.vnpt.vn
123.31.38.114	A	www.bagi.com.vn
123.31.38.114	A	thuongdo.vn
123.31.38.119	A	professionalcheckingsystem.com
123.31.38.121	PTR	localhost
123.31.38.121	A	anhvinh.com
123.31.38.121	A	quanlyxekhach.com
123.31.38.122	PTR	static.vnpt.vn
123.31.38.123	PTR	localhost
123.31.38.123	A	mail.khanhpoly.com
123.31.38.136	PTR	static.vnpt.vn
123.31.38.136	A	aotienvandon.com
123.31.38.136	A	batdongsanmaiquyen.com
123.31.38.138	PTR	static.vnpt.vn
123.31.38.151	A	mail.easyon.vn
123.31.38.151	A	mail.softdreams.vn
123.31.38.151	A	mail.easyinvoice.vn
123.31.38.152	PTR	static.vnpt.vn
123.31.38.152	A	banhtrungthubaophuong.com
123.31.38.152	A	asianrubyparkview.com
123.31.38.154	PTR	localhost
123.31.38.155	PTR	static.vnpt.vn