Robtex

Up: 27.72.64.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 27.72.64.0/20
Down right: 27.72.80.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
27.72.64.235	PTR	localhost
27.72.65.33	PTR	localhost
27.72.68.135	PTR	localhost
27.72.68.140	A	ttcvn.net
27.72.69.210	A	bttytb.hopto.org
27.72.72.34	PTR	localhost
27.72.72.98	PTR	localhost
27.72.72.98	A	mail.sannhiquangninh.vn
27.72.72.98	A	sannhiquangninh.vn
27.72.72.224	PTR	dynamic-adsl.viettel.vn
27.72.73.9	A	noscosmetics.com
27.72.73.166	PTR	localhost
27.72.73.199	PTR	localhost
27.72.73.199	A	cdythaiphong.edu.vn
27.72.73.242	PTR	mail.vtlhp.vn
27.72.73.242	A	mail.cayxanhhaihung.com
27.72.75.227	PTR	dynamic-ip-adsl.viettel.vn
27.72.76.2	A	qltacphamvhntpt.com
27.72.79.198	A	thptphandinhgiot.edu.vn
27.72.79.198	A	www.thpt-tuangiao-dienbien.edu.vn
27.72.79.198	A	thpt-tuangiao-dienbien.edu.vn
27.72.79.229	PTR	localhost
27.72.79.229	A	tuangiao.edu.vn
27.72.79.229	A	thcsquainua.tuangiao.edu.vn
27.72.80.9	PTR	localhost
27.72.80.102	PTR	dynamic-ip-adsl.viettel.vn
27.72.80.102	A	chuyenkhamnamkhoabacninh.com
27.72.80.237	A	srolegends.com
27.72.81.168	PTR	dynamic-ip-adsl.viettel.vn
27.72.84.87	PTR	dynamic-ip-adsl.viettel.vn
27.72.84.87	A	bvcubadonghoi.vn
27.72.84.138	A	smtp.gelowitz.org
27.72.86.168	PTR	ftts.co
27.72.86.168	PTR	mail.fortresstooks.com.vn
27.72.88.50	A	vimcitygialam.com
27.72.88.54	A	hrm.eurowindow.biz
27.72.88.84	PTR	localhost
27.72.88.84	A	dinhdoship.com
27.72.88.84	A	metjc.com
27.72.88.105	PTR	localhost
27.72.88.116	PTR	localhost
27.72.88.116	A	tanthangcement.com
27.72.88.120	PTR	localhost
27.72.88.155	PTR	localhost
27.72.88.155	A	pvr.vn
27.72.88.155	A	svpgate.com
27.72.88.167	PTR	dynamic-ip-adsl.viettel.vn
27.72.88.220	A	viwa.gov.vn
27.72.88.241	A	daugiash.com
27.72.90.118	PTR	localhost
27.72.90.118	A	foutecvn.com
27.72.95.134	PTR	dynamic-ip-adsl.viettel.vn