Robtex

Up: 27.72.0.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 27.72.0.0/19
Down right: 27.72.32.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
27.72.0.0	PTR	localhost
27.72.0.138	PTR	localhost
27.72.0.244	PTR	localhost
27.72.1.20	PTR	localhost
27.72.1.20	A	mail01.agrivina.com
27.72.1.20	A	dalathasfarm.com
27.72.1.35	A	raovatdaknong.com
27.72.1.113	PTR	localhost
27.72.4.2	PTR	localhost
27.72.6.2	PTR	localhost
27.72.17.76	A	cknguyen.org
27.72.17.167	PTR	localhost
27.72.18.33	PTR	localhost
27.72.19.245	PTR	localhost
27.72.19.245	A	beautymonday.com
27.72.19.253	PTR	localhost
27.72.21.8	PTR	localhost
27.72.21.13	PTR	localhost
27.72.21.13	A	npmb.vn
27.72.21.13	A	nppmb.vn
27.72.21.34	A	mail.vicembutson.com.vn
27.72.21.135	PTR	dynamic-adsl.viettel.vn
27.72.22.37	PTR	dynamic-adsl.viettel.vn
27.72.22.37	A	xbqdnd.vn
27.72.23.66	A+PTR	mail.ancnc.vn
27.72.23.66	A	www.phuchoidata.com
27.72.23.66	A	mail.phuchoidata.com
27.72.23.70	A	ancnc.vn
27.72.26.63	PTR	localhost
27.72.28.111	A	www.adctopweb.com
27.72.28.111	A	quoctehanoi.edu.vn
27.72.28.219	PTR	localhost
27.72.28.219	A	hanoidigestivecenter.net
27.72.28.226	A	vgs.vn
27.72.29.41	PTR	dynamic-adsl.viettel.vn
27.72.29.41	A	en-cls.vn
27.72.29.108	PTR	localhost
27.72.29.180	A	ticketingnamthanh.com
27.72.29.180	A	tdev.tk
27.72.29.180	A	supportnamthanh.com
27.72.30.42	PTR	dynamic-adsl.viettel.vn
27.72.30.42	A	mail.landdecor.vn
27.72.30.182	A	iocorner.com
27.72.30.244	A	linhkientuancuong.com
27.72.30.244	A	www.machintuancuong.com
27.72.31.30	A	mail.amonir.com
27.72.31.30	A	amonir.com
27.72.31.96	A	phinvlabs.com
27.72.31.96	A	dlccomplexs.com
27.72.31.111	PTR	localhost
27.72.31.111	A	shopnonthoitrang.com
27.72.31.185	A	mail.phanbonquocgia.gov.vn
27.72.31.185	A	www.phanbonquocgia.gov.vn
27.72.31.185	A	phanbonquocgia.gov.vn
27.72.32.130	PTR	localhost
27.72.36.68	PTR	localhost
27.72.40.71	PTR	localhost
27.72.40.186	PTR	localhost
27.72.41.196	A	danngason.asia
27.72.42.131	A	ximanglongson.com
27.72.42.167	PTR	localhost
27.72.42.167	A	maytinhquocthai.com
27.72.42.167	A	www.maytinhquocthai.com
27.72.44.113	PTR	localhost
27.72.45.173	PTR	localhost
27.72.45.221	PTR	dynamic-ip-adsl.viettel.vn
27.72.46.135	PTR	localhost
27.72.46.142	A	tudonghoathaibinh.com
27.72.46.142	A	truongchinhtrithaibinh.edu.vn
27.72.46.142	A	mttq.thaibinh.gov.vn
27.72.47.138	PTR	localhost
27.72.49.122	PTR	localhost
27.72.49.197	PTR	localhost
27.72.49.221	PTR	dynamic-ip-adsl.viettel.vn
27.72.49.251	PTR	localhost
27.72.56.28	PTR	localhost
27.72.56.28	A	kb.ftl.vn
27.72.56.28	A	products.php.kb.ftl.vn
27.72.56.125	PTR	localhost
27.72.56.142	PTR	localhost
27.72.56.142	A	fsivietnam.com.vn
27.72.56.142	A	fsivietnam.vn
27.72.56.186	PTR	localhost
27.72.56.186	A	habanosvn.com
27.72.56.186	A	www.mamnonminhduong.edu.vn
27.72.56.196	PTR	localhost
27.72.56.196	A	quantridn.com
27.72.56.217	PTR	localhost
27.72.56.244	PTR	localhost
27.72.57.17	PTR	localhost
27.72.57.17	A	hyundai-hn.com
27.72.57.45	PTR	localhost
27.72.57.55	PTR	localhost
27.72.57.124	PTR	dynamic-ip-adsl.viettel.vn
27.72.57.124	A	truyen-api.sachmem.vn
27.72.57.124	A	comments.sachmem.vn
27.72.57.151	PTR	localhost
27.72.57.151	A	tonkinland.com
27.72.57.151	A	www.quangcaosanbay.net
27.72.57.215	PTR	localhost
27.72.57.215	A	thegioithedientu.com
27.72.57.215	A	www.xpay.com.vn
27.72.57.251	PTR	dynamic-adsl.viettel.vn
27.72.57.251	A	phuquygold.com.vn
27.72.57.251	A	www.giavang24h.com
27.72.58.78	A+PTR	mail.trucbach.vn
27.72.58.78	A	trucbach.vn
27.72.58.78	A	ytuongmoi.com.vn
27.72.58.160	A	grdsolution.com
27.72.58.237	A	bdviet.org
27.72.59.9	PTR	localhost
27.72.59.209	PTR	localhost
27.72.59.253	A	qbvptrhagiang.vn
27.72.59.253	A	www.siteam.vn
27.72.59.253	A	codetechone.com
27.72.60.5	A	haybuonban.com
27.72.60.5	A	keyweb.vn
27.72.60.5	A	ksmain.com
27.72.60.25	PTR	localhost
27.72.61.21	PTR	mail.galaxyvietnam.vn
27.72.61.21	PTR	mail.hisungdoor.com
27.72.61.21	A	mail.galaxyviet.vn
27.72.61.38	PTR	localhost
27.72.61.38	A	onfire.vn
27.72.61.38	A	imbastore.vn
27.72.61.90	A	inrad.vn
27.72.62.125	A	www.alodenled.vn
27.72.62.125	A	linhkieneu.com
27.72.62.125	A	nhadatthanhoai.com
27.72.62.254	PTR	localhost
27.72.63.13	A	giaidieu.com
27.72.63.130	PTR	localhost
27.72.63.130	A	clbmohinh.com
27.72.63.160	PTR	dynamic-ip-adsl.viettel.vn
27.72.63.165	A	tusachluat.vn
27.72.63.165	A	luattrongtay.vn
27.72.63.165	A	www.luattrongtay.vn
27.72.63.168	PTR	localhost