Robtex

Up: 203.113.128.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.113.128.0/23
Down right: 203.113.130.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.113.129.33	A	sys.vp9.vn
203.113.129.51	A	core.vcam.viettel.vn
203.113.129.76	A	r1---sn-8pxuuxa-i5ol7.googlevideo.com
203.113.129.77	A	r2.sn-8pxuuxa-i5ol7.gvt1.com
203.113.129.77	A	r2---sn-8pxuuxa-i5ol7.googlevideo.com
203.113.129.78	A	r3---sn-8pxuuxa-i5ol7.googlevideo.com
203.113.129.80	A	r5---sn-8pxuuxa-i5ol7.googlevideo.com
203.113.129.81	A	r6.sn-8pxuuxa-i5ol7.googlevideo.com
203.113.129.81	A	r6---sn-8pxuuxa-i5ol7.gvt1.com
203.113.129.82	A	r7---sn-8pxuuxa-i5ol7.gvt1.com
203.113.129.108	A	r1---sn-8pxuuxa-i5ole.googlevideo.com
203.113.129.108	A	r1.sn-8pxuuxa-i5ole.googlevideo.com
203.113.129.109	A	r2.sn-8pxuuxa-i5ole.googlevideo.com
203.113.129.110	A	r3.sn-8pxuuxa-i5ole.googlevideo.com
203.113.129.113	A	r6---sn-8pxuuxa-i5ole.gvt1.com
203.113.129.113	A	r6---sn-8pxuuxa-i5ole.googlevideo.com
203.113.129.113	A	r6.sn-8pxuuxa-i5ole.googlevideo.com
203.113.129.114	A	r7---sn-8pxuuxa-i5ole.googlevideo.com
203.113.129.140	A	r1---sn-8pxuuxa-i5oed.googlevideo.com
203.113.129.140	A	r1.sn-8pxuuxa-i5oed.gvt1.com
203.113.129.141	A	r2---sn-8pxuuxa-i5oed.gvt1.com
203.113.129.141	A	r2.sn-8pxuuxa-i5oed.googlevideo.com
203.113.129.144	A	r5.sn-8pxuuxa-i5oed.gvt1.com
203.113.129.144	A	r5---sn-8pxuuxa-i5oed.googlevideo.com
203.113.129.145	A	r6.sn-8pxuuxa-i5oed.googlevideo.com
203.113.129.145	A	r6.sn-8pxuuxa-i5oed.gvt1.com
203.113.129.152	A	yamahanouvo4.net
203.113.129.172	A	r1.sn-8pxuuxa-i5oek.googlevideo.com
203.113.129.172	A	r1---sn-8pxuuxa-i5oek.googlevideo.com
203.113.129.172	A	r1---sn-8pxuuxa-i5oek.gvt1.com
203.113.129.173	A	r2.sn-8pxuuxa-i5oek.googlevideo.com
203.113.129.176	A	r5---sn-8pxuuxa-i5oek.googlevideo.com
203.113.129.176	A	r5.sn-8pxuuxa-i5oek.gvt1.com
203.113.129.176	A	r5---sn-8pxuuxa-i5oek.gvt1.com
203.113.129.177	A	r6---sn-8pxuuxa-i5oek.gvt1.com
203.113.129.204	A	r1.sn-8pxuuxa-i5oer.gvt1.com
203.113.129.205	A	r2---sn-8pxuuxa-i5oer.googlevideo.com
203.113.129.206	A	r3.sn-8pxuuxa-i5oer.googlevideo.com
203.113.129.206	A	r3.sn-8pxuuxa-i5oer.gvt1.com
203.113.129.208	A	r5.sn-8pxuuxa-i5oer.gvt1.com
203.113.129.208	A	r5.sn-8pxuuxa-i5oer.googlevideo.com
203.113.129.209	A	r6.sn-8pxuuxa-i5oer.googlevideo.com
203.113.129.209	A	r6---sn-8pxuuxa-i5oer.googlevideo.com
203.113.130.44	A	r1.sn-8pxuuxa-i5oey.googlevideo.com
203.113.130.44	A	r1---sn-8pxuuxa-i5oey.googlevideo.com
203.113.130.45	A	r2.sn-8pxuuxa-i5oey.gvt1.com
203.113.130.46	A	r3---sn-8pxuuxa-i5oey.googlevideo.com
203.113.130.48	A	r5---sn-8pxuuxa-i5oey.googlevideo.com
203.113.130.48	A	r5---sn-8pxuuxa-i5oey.gvt1.com
203.113.130.49	A	r6.sn-8pxuuxa-i5oey.googlevideo.com
203.113.130.49	A	r6---sn-8pxuuxa-i5oey.googlevideo.com
203.113.130.56	PTR	mail.bvvn.com.vn
203.113.130.58	PTR	www.bvonline.com.vn
203.113.130.58	A	admin.nhantho.vn
203.113.130.59	PTR	mail.bvonline.com.vn
203.113.130.106	PTR	mail.moj.gov.vn
203.113.130.106	A	tcdcpl.moj.gov.vn
203.113.130.106	A	ctpn.moj.gov.vn
203.113.130.107	A	ttlltp.moj.gov.vn
203.113.130.108	A	thutuchanhchinh.vn
203.113.130.108	A	csdl.thutuchanhchinh.vn
203.113.130.109	A	tcldonghoi.moj.gov.vn
203.113.130.109	A	trungcapluatthainguyen.moj.gov.vn
203.113.130.131	A	www.vtcc.vn
203.113.130.134	A	cyberm.online
203.113.130.140	A	safenet.vn
203.113.130.149	A	ifc.com.vn
203.113.130.150	PTR	dns.elcom.com.vn
203.113.130.156	PTR	mail.misoft.com.vn
203.113.130.164	A	thegioiblog.com
203.113.130.173	PTR	dailyinfo.vn
203.113.130.173	PTR	www.ciri.com.vn
203.113.130.173	A	fstyle.vn
203.113.130.181	PTR	ftp.cms.com.vn
203.113.130.189	PTR	mobile.viettel.vn.130.113.203.in-addr.arpa
203.113.130.195	A	mta02.vnu.edu.vn
203.113.130.199	A+PTR	gateway.mail.vnu.edu.vn
203.113.130.199	A	gateway.mail.vnu.vn
203.113.130.201	A	coltech.vnu.edu.vn
203.113.130.201	A	coltech.vnu.vn
203.113.130.201	A	news4st.coltech.vnu.edu.vn
203.113.130.204	A	bulletin.vnu.edu.vn
203.113.130.204	A	news.vnu.edu.vn
203.113.130.206	PTR	mail.vnu.edu.vn
203.113.130.206	A	mail.vnu.vn
203.113.130.213	PTR	netpro.com.vn
203.113.130.215	A	www.lic.vnu.edu.vn
203.113.130.215	A	lic.vnu.edu.vn
203.113.130.217	A	www.dphanoi.org.vn
203.113.130.217	A	dphanoi.org.vn
203.113.130.220	A	ftp.vnu.edu.vn
203.113.130.221	A+PTR	dns.vnu.edu.vn
203.113.130.221	A	dns.coltech.vnu.vn
203.113.130.221	A	dns.vnu.vn
203.113.130.222	PTR	www.vnu.edu.vn
203.113.130.234	A+PTR	mail.mcsb.com.vn
203.113.130.234	A	mail.militarybank.com.vn
203.113.130.250	A	viettelpost.com.vn
203.113.130.250	A	www.viettelpost.com.vn
203.113.130.253	PTR	dns1.uct.edu.vn
203.113.130.254	A	viettelpost.com.vn
203.113.130.254	A	www.viettelpost.com.vn
203.113.130.254	A	www.vtp.vn
203.113.131.1	A+PTR	dns1.vietel.com.vn
203.113.131.1	A+PTR	dns1.viettel.com.vn
203.113.131.2	A+PTR	dns4.vietel.com.vn
203.113.131.2	A+PTR	dns4.viettel.com.vn
203.113.131.3	PTR	database.vietel.com.vn
203.113.131.4	A	billing.vietel.com.vn
203.113.131.9	A	web.vietel.com.vn
203.113.131.11	A+PTR	backup.viettel.com.vn
203.113.131.15	A+PTR	spamfilter.viettel.vn
203.113.131.16	A+PTR	mta-viettel-02.viettel.com.vn
203.113.131.16	A	smtp.vietel.com.vn
203.113.131.18	A	mailfilter-in.viettel.vn
203.113.131.23	A+PTR	incoming.viettel.com.vn
203.113.131.23	PTR	mailfilter-in-01.viettel.com.vn
203.113.131.23	A	incoming.vietel.com.vn
203.113.131.24	A+PTR	mailfilter-out-01.viettel.com.vn
203.113.131.25	A	pop3.vietel.com.vn
203.113.131.25	A	mail.sfcvietnam.vn
203.113.131.25	A	mail.sfcvietnam.com
203.113.131.26	PTR	mta-out-01.viettel.com.vn
203.113.131.26	PTR	smtp.viettel.com.vn
203.113.131.27	PTR	mta-in-01.viettel.com.vn
203.113.131.33	A+PTR	aaa.vietel.com.vn
203.113.131.34	PTR	mail.cswindtower.com
203.113.131.34	PTR	mail.fareastea.com
203.113.131.34	PTR	mail.isb-vietnam.com
203.113.131.35	A+PTR	ldap.vietel.com.vn
203.113.131.36	PTR	smtp.viettel.vn
203.113.131.37	A+PTR	billing.viettel.vn
203.113.131.49	PTR	178.vietel.com.vn
203.113.131.49	A	viettel.net.vn
203.113.131.49	A	vietteltelecom.com.vn
203.113.131.66	PTR	sps.viettel.vn
203.113.131.69	PTR	www.vra.gov.vn
203.113.131.69	A	web.sfcvietnam.com
203.113.131.69	A	zik.vietteltelecom.vn
203.113.131.72	A	web.viettel.com.vn
203.113.131.85	PTR	dns3.vietel.com.vn
203.113.131.99	A	admm.org.vn
203.113.131.112	A	ngoinhacuaban.com
203.113.131.112	A	garfield-cuncoi.com
203.113.131.123	A+PTR	observation.viettel.vn
203.113.131.124	PTR	adslfail.viettel.vn
203.113.131.140	PTR	huetronics.vn
203.113.131.145	A	external.fhan5-1.fna.fbcdn.net
203.113.131.145	A	scontent.fhan5-1.fna.fbcdn.net
203.113.131.146	A	video.fhan5-1.fna.fbcdn.net
203.113.131.158	A	z-m-scontent.fhan5-1.fna.fbcdn.net
203.113.131.158	A	sonar.fhan5-1.fna.fbcdn.net
203.113.131.158	A	z-1-video.fhan5-1.fna.fbcdn.net
203.113.131.160	A	instagram.fhan5-1.fna.fbcdn.net
203.113.131.161	A	media.fhan5-1.fna.whatsapp.net
203.113.131.162	A	z-p3-scontent.fhan5-1.fna.fbcdn.net
203.113.131.168	A	z-1-scontent.fhan5-1.fna.fbcdn.net
203.113.131.209	A	scontent.fhan5-2.fna.fbcdn.net
203.113.131.210	A	video.fhan5-2.fna.fbcdn.net
203.113.131.222	A	z-1-video.fhan5-2.fna.fbcdn.net
203.113.131.222	A	sonar.fhan5-2.fna.fbcdn.net
203.113.131.222	A	z-m-scontent.fhan5-2.fna.fbcdn.net
203.113.131.224	A	instagram.fhan5-2.fna.fbcdn.net
203.113.131.225	A	media.fhan5-2.fna.whatsapp.net
203.113.131.232	A	z-1-scontent.fhan5-2.fna.fbcdn.net