Robtex

Up: 220.231.96.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 220.231.96.0/21
Down right: 220.231.104.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
220.231.96.2	PTR	mail.tasco.com.vn
220.231.96.24	A+PTR	sami.vn
220.231.96.24	A	mail.mcsoft.vn
220.231.96.24	A	mail.sami.vn
220.231.96.30	PTR	mail.chodainecntb.vn
220.231.96.35	PTR	mail.vicorp.com.vn
220.231.96.36	A	ecus.net.vn
220.231.96.49	PTR	mail-nkt.paynet.com.vn
220.231.96.56	PTR	mail.ifcvietnam.com.vn
220.231.96.87	A	mail.callcenter.vn
220.231.96.87	A	mailc.callcenter.vn
220.231.96.90	A	vgisc.net
220.231.96.90	A	mail.vgisc.net
220.231.96.93	PTR	mail.ifcvietnam.com.vn
220.231.96.120	PTR	mail.tpa.com.vn
220.231.96.195	PTR	ksm.vn
220.231.96.195	PTR	ksm.com.vn
220.231.96.195	PTR	mail.ksm.com.vn
220.231.97.0	PTR	localhost
220.231.97.11	A	dttp.vn
220.231.97.23	A	admin.unicom.com.vn
220.231.97.33	PTR	localhost
220.231.97.49	PTR	localhost
220.231.97.65	PTR	localhost
220.231.97.67	PTR	localhost
220.231.97.96	PTR	localhost
220.231.97.112	PTR	localhost
220.231.97.114	PTR	localhost
220.231.97.128	PTR	localhost
220.231.97.131	PTR	localhost
220.231.97.145	PTR	localhost
220.231.97.163	PTR	localhost
220.231.97.193	PTR	localhost
220.231.97.227	PTR	localhost
220.231.100.49	PTR	localhost
220.231.100.50	PTR	localhost
220.231.100.66	PTR	localhost
220.231.100.80	PTR	localhost
220.231.100.99	PTR	localhost
220.231.100.112	PTR	localhost
220.231.100.131	PTR	localhost
220.231.100.160	PTR	localhost
220.231.100.161	PTR	localhost
220.231.100.179	PTR	localhost
220.231.100.226	PTR	localhost
220.231.100.243	PTR	localhost
220.231.101.3	PTR	localhost
220.231.101.18	PTR	mail.wru.edu.vn
220.231.101.50	PTR	localhost
220.231.101.50	A	cdsptb.edu.vn
220.231.101.178	PTR	localhost
220.231.101.226	PTR	localhost
220.231.101.226	A	hup.edu.vn
220.231.101.226	A	www.hup.edu.vn
220.231.102.80	PTR	localhost
220.231.102.83	PTR	localhost
220.231.102.131	PTR	localhost
220.231.104.0	PTR	localhost
220.231.104.2	PTR	localhost
220.231.104.2	A	viettelvas.com.vn
220.231.104.3	PTR	localhost
220.231.104.3	A	mail.viettelmedia.vn
220.231.104.35	PTR	localhost
220.231.104.64	PTR	localhost
220.231.104.83	PTR	localhost
220.231.104.99	PTR	localhost
220.231.104.115	PTR	localhost
220.231.104.176	PTR	localhost
220.231.104.242	PTR	localhost
220.231.104.252	A	vttstore.com
220.231.105.46	A	trithucdatto.vn
220.231.105.46	A	soyte.phutho.gov.vn
220.231.105.46	A	hahoa.phutho.gov.vn
220.231.105.242	A	thuvienmythuat.vn
220.231.105.242	A	www.thuvienmythuat.vn
220.231.106.29	A	web.hvnh.edu.vn
220.231.106.74	A+PTR	exchange.bes.viettel.com.vn
220.231.106.85	A	socongthuong.phutho.gov.vn
220.231.106.86	A	hahoa.phutho.gov.vn
220.231.106.86	A	xoso.phutho.gov.vn
220.231.106.86	A	bqlkcn.phutho.gov.vn
220.231.106.98	A	vvc.com.vn
220.231.106.109	A	hanoiedu.vn
220.231.106.109	A	www.hanoiedu.vn
220.231.106.109	A	khohoclieu.hanoiedu.vn
220.231.107.2	A+PTR	mail1.eurowindow.biz
220.231.107.2	PTR	mail.melinhplaza.biz
220.231.107.2	PTR	mail.eurowindow-holding.com
220.231.107.3	A+PTR	mail.eurowindow.biz
220.231.107.3	A+PTR	mail.melinhplaza.biz
220.231.107.3	PTR	mail.eurowindow-holding.com
220.231.107.4	PTR	mail.fantasea.vn
220.231.107.19	A	melinhplaza.biz
220.231.107.29	A	ketoanvien.com.vn
220.231.107.130	A	daotao.vnua.edu.vn
220.231.107.132	A	www1.vnua.edu.vn
220.231.107.133	A+PTR	mail.vnua.edu.vn
220.231.107.134	PTR	mail.cares.org.vn
220.231.107.134	A	file.vnua.edu.vn
220.231.107.134	A	vnua.edu.vn
220.231.107.145	A	hua.edu.vn
220.231.107.145	A	www.hua.edu.vn
220.231.107.148	A+PTR	mail.hua.edu.vn
220.231.107.157	A	vnua.edu.vn
220.231.107.241	A+PTR	mail.backan.gov.vn
220.231.107.241	A	ns2.backan.gov.vn
220.231.107.242	A	dichvucong.backan.gov.vn
220.231.107.242	A	www.backan.gov.vn
220.231.108.0	PTR	localhost