Robtex

Up: 171.255.192.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 171.255.192.0/25
Down right: 171.255.192.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
171.255.192.4	A	phapluat.netnews.vn
171.255.192.16	PTR	dynamic-ip-adsl.viettel.vn
171.255.192.16	A	qlvb.thainguyen.edu.vn
171.255.192.16	A	edu.vpdt.com.vn
171.255.192.22	A	video.mocha.com.vn
171.255.192.22	A	m.video.mocha.com.vn
171.255.192.23	PTR	dynamic-ip-adsl.viettel.vn
171.255.192.23	A	video.mocha.com.vn
171.255.192.23	A	m.video.mocha.com.vn
171.255.192.25	A	media2.tiin.vn
171.255.192.25	A	media22.tiin.vn
171.255.192.26	A	mcvideo.imgvip.keeng.net
171.255.192.26	A	media2.sieuhai.tv
171.255.192.26	A	apiphim.onbox.vn
171.255.192.27	A	mcvideo.imgvip.keeng.net
171.255.192.27	A	media2.sieuhai.tv
171.255.192.27	A	apiphim.onbox.vn
171.255.192.28	A	mcvideo.imgvip.keeng.net
171.255.192.28	A	media2.sieuhai.tv
171.255.192.28	A	media3.onbox.vn
171.255.192.29	A	mcvideo.imgvip.keeng.net
171.255.192.29	A	media2.sieuhai.tv
171.255.192.29	A	media3.onbox.vn
171.255.192.30	A	www.tinngan.vn
171.255.192.30	A	tinngan.vn
171.255.192.31	A	www.tinngan.vn
171.255.192.39	PTR	dynamic-adsl.viettel.vn
171.255.192.39	A	smasplus.smas.edu.vn
171.255.192.86	PTR	dynamic-adsl.viettel.vn
171.255.192.86	A	analysis.viettel.vn
171.255.192.101	A	www.kenhhai.vn
171.255.192.101	A	kenhhai.vn
171.255.192.107	A	qlth.haiduong.edu.vn
171.255.192.107	A	qlth.quangninh.edu.vn
171.255.192.108	A	smsedu.smas.vn
171.255.192.118	PTR	dynamic-ip-adsl.viettel.vn
171.255.192.120	A	mbccs.viettel.vn
171.255.192.128	PTR	dynamic-adsl.viettel.vn
171.255.192.128	A	csdl.edu.vn
171.255.192.151	A	vietteliot.com
171.255.192.209	A	viettelfamilyglobal.com
171.255.192.239	A	viettelstudy.vn
171.255.192.239	A	www.viettelstudy.vn
171.255.192.241	A	sso-edu.viettel.vn
171.255.192.244	PTR	dynamic-ip-adsl.viettel.vn
171.255.192.244	A	lite.dmsone.vn
171.255.192.245	A	dmsone.vn
171.255.192.246	PTR	dynamic-adsl.viettel.vn
171.255.192.246	A	api-sinvoice.viettel.vn
171.255.192.247	PTR	dynamic-ip-adsl.viettel.vn
171.255.192.247	A	business-sinvoice.viettel.vn
171.255.192.248	A	sinvoice.vn
171.255.192.248	A	mail.sinvoice.vn