Robtex

Up: 117.6.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 117.6.136.0/22
Down right: 117.6.140.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
117.6.136.16	A+PTR	mail.terra-indochina.com
117.6.136.136	PTR	mail.genetic.edu.vn
117.6.136.136	A	www.genetic.edu.vn
117.6.136.137	PTR	mail.bkholdings.com.vn
117.6.136.137	A	mail.jsv.edu.vn
117.6.136.139	A	bkcontech.com
117.6.136.168	A	qeencomputer.com
117.6.136.252	A+PTR	server1.lidecoba.com.vn
117.6.136.252	A	mail.lidecoba.com.vn
117.6.136.252	A	email.lidecoba.com.vn
117.6.137.72	A+PTR	mail.cfc.com.vn
117.6.137.72	A+PTR	srv-mbx-01.cfc.com.vn
117.6.137.74	A	www.cfc.com.vn
117.6.137.74	A	cfc.com.vn
117.6.137.75	PTR	slife.vn
117.6.139.12	A	bachtoan.net
117.6.139.12	A	trian.vn
117.6.139.12	A	songchifood.com
117.6.139.48	A	www.apos.vn
117.6.139.130	PTR	mail.petecare.com.vn
117.6.139.131	A	www.petecare.com.vn
117.6.142.112	A	aits.vn
117.6.142.112	A	aits.com.vn
117.6.142.178	A	mail.flamingodailai.com
117.6.142.178	A	mail.flamingovietnam.com
117.6.142.179	A	congviennho.vn
117.6.142.179	A	congviennho.com
117.6.143.104	A	giaydantuongstore.com
117.6.143.104	A	chuyenhangtbn.com
117.6.143.104	A	chuabenhvaynen.com
117.6.143.242	A	scloudolm.net