Robtex

Up: 27.72.144.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 27.72.144.0/23
Down right: 27.72.146.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
27.72.144.30	PTR	localhost
27.72.144.30	A	www.uptek.vn
27.72.144.30	A	forever68.com
27.72.144.89	PTR	localhost
27.72.144.89	A	diasoft-hn.com
27.72.144.89	A	comsuon.com
27.72.144.121	A	duykien99.com
27.72.144.127	PTR	localhost
27.72.144.133	PTR	localhost
27.72.144.133	A	ketoanaz.net
27.72.144.133	A	mail.mikhaiin.com
27.72.144.140	PTR	localhost
27.72.144.140	A	xexuyenviet.com
27.72.144.147	PTR	localhost
27.72.144.149	PTR	localhost
27.72.144.149	A	daykemtot.com
27.72.144.180	PTR	localhost
27.72.144.180	A	vsolution.vn
27.72.144.180	A	mail.vsolution.vn
27.72.145.99	A	plastic-edu.com
27.72.145.99	A	baotri365.vn
27.72.145.99	A	dinhvigiadinh.com
27.72.146.2	A	khonickre.com
27.72.146.2	A	nickre18.com
27.72.146.2	A	www.thuthecao.com
27.72.146.11	A	pvoilthanhhoa.com
27.72.146.120	A	huyenthoainhanpham.com
27.72.146.133	A	bdstaynamkimgiang.com
27.72.146.133	A	kenhvn2.com
27.72.146.133	A	vincity-namtuliem.com
27.72.146.181	A	knowestpublishing.com
27.72.146.181	A	khaitri.vn
27.72.146.181	A	knowest.org
27.72.146.228	PTR	dynamic-ip-adsl.viettel.vn
27.72.146.228	A	vnatel.com
27.72.146.246	A	www.9prints.com
27.72.147.55	A	pvr.vn
27.72.147.64	PTR	dynamic-ip-adsl.viettel.vn
27.72.147.64	A	www.prowork.vn
27.72.147.64	A	prowork.vn
27.72.147.145	A	adrvn.com
27.72.147.183	A	mail.sunnyvietnam-jsc.com.vn
27.72.147.183	A	sunnyvietnam-jsc.com.vn