Robtex

Up: 210.245.22.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 210.245.23.0/25
Down right: 210.245.23.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.245.23.4	PTR	host-23-xx.hcm.fpt.vn
210.245.23.5	A+PTR	mail.rkw-lotus.com
210.245.23.6	PTR	host-23-xx.hcm.fpt.vn
210.245.23.7	A+PTR	mail.autosaigon.com
210.245.23.8	A+PTR	mail.tbcball.com
210.245.23.10	A	mail.timdo.com.vn
210.245.23.16	A+PTR	gw03.fptdata.vn
210.245.23.17	A+PTR	venus-communications.com
210.245.23.17	A	www.venus-communications.com
210.245.23.17	A	venuspr.com
210.245.23.18	PTR	host-23-xx.hcm.fpt.vn
210.245.23.18	A	mail.cotecin.com.vn
210.245.23.20	A	gw02.fptdata.vn
210.245.23.21	PTR	host-23-xx.hcm.fpt.vn
210.245.23.21	A	duhocnhatbannippon.com
210.245.23.21	A	mail.viegroupsce.eu
210.245.23.22	PTR	host-23-xx.hcm.fpt.vn
210.245.23.22	A	root.up-anh.com
210.245.23.25	A+PTR	dns9.fptdata.vn
210.245.23.25	A	ns1.incomda.com
210.245.23.25	A	ns1.tenmienquocgia.vn
210.245.23.29	PTR	host-23-xx.hcm.fpt.vn
210.245.23.29	A	images.diadiem.com.vn
210.245.23.30	A+PTR	gw01.fptdata.vn
210.245.23.33	PTR	mail.daugia247.com
210.245.23.35	PTR	host-23-xx.hcm.fpt.vn
210.245.23.35	A	mail.muavaban.vn
210.245.23.42	PTR	ns19.pavietnam.vn
210.245.23.43	PTR	ns17.pavietnam.vn
210.245.23.44	PTR	mailserver2.pavietnam.net
210.245.23.52	A	www.ankhang.info
210.245.23.52	A	ankhang.info
210.245.23.56	A+PTR	mail3.dentsu.com.vn
210.245.23.60	A+PTR	mail.lhc.vn
210.245.23.60	PTR	vps2360.lhc.vn
210.245.23.60	A	peppertree.it
210.245.23.75	PTR	host-23-xx.hcm.fpt.vn
210.245.23.77	PTR	mail.eqdesign.net
210.245.23.77	A	https2f2fmail.vass.com.vn
210.245.23.77	A	mail.damphumy.vn
210.245.23.80	A+PTR	smtp1.fptdata.net
210.245.23.81	A+PTR	smtp.cloud.fptdata.com
210.245.23.81	A+PTR	mail.dpt.com.vn
210.245.23.82	PTR	mail.vidomedia.vn
210.245.23.82	PTR	isp-www5.hcm.fpt.vn
210.245.23.82	A	xaydungsantennis.com
210.245.23.83	PTR	webhost10.fptdata.vn
210.245.23.83	A	ngocxuanseafood.com.vn
210.245.23.83	A	sophiahotelvietnam.com
210.245.23.84	PTR	host-23-xx.hcm.fpt.vn
210.245.23.84	A	www.bookvietnamtours.com
210.245.23.84	A	bookvietnamtours.com
210.245.23.85	PTR	host-23-xx.hcm.fpt.vn
210.245.23.85	A	bienhoa2ip.com
210.245.23.85	A	www.vietphuthanhchuong.com
210.245.23.87	PTR	mail.apic.com.vn
210.245.23.100	PTR	host-23-xx.hcm.fpt.vn
210.245.23.101	A	mail.nganhangmhb.vn
210.245.23.106	PTR	mail.chamspamassage.com
210.245.23.106	A	chamspamassage.com
210.245.23.106	A	massagedanang.com
210.245.23.107	PTR	host-23-xx.hcm.fpt.vn
210.245.23.107	A	esnet.com.vn
210.245.23.108	A	www.saleoffmy.com
210.245.23.109	PTR	host-23-xx.hcm.fpt.vn
210.245.23.110	A+PTR	smtp4.fptdata.net
210.245.23.119	PTR	host-23-xx.hcm.fpt.vn
210.245.23.119	A	www.ttnndhsp.com
210.245.23.119	A	www.vus.edu.vn
210.245.23.120	PTR	host-23-xx.hcm.fpt.vn
210.245.23.120	A	isp-www5.fpt.vn
210.245.23.120	A	noibaidutyfree.com
210.245.23.123	PTR	host-23-xx.hcm.fpt.vn
210.245.23.129	A	mail.tandao.tk
210.245.23.130	PTR	host-23-xx.hcm.fpt.vn
210.245.23.130	A	www.camxahoc.com
210.245.23.130	A	camxahoc.com
210.245.23.133	PTR	mail.incomda.com
210.245.23.133	A	mail.daihoangphatcoffee.com.vn
210.245.23.134	PTR	mail.apic.com.vn
210.245.23.135	PTR	host-23-xx.hcm.fpt.vn
210.245.23.135	A	games.yola.vn
210.245.23.136	PTR	host-23-xx.hcm.fpt.vn
210.245.23.136	A	thuoctrangda.com
210.245.23.136	A	yhocthucchung.com
210.245.23.141	A	mail.smtp.maurilanga.com
210.245.23.144	PTR	host-23-xx.hcm.fpt.vn
210.245.23.144	A	tienphatmep.com
210.245.23.144	A	mail.canchuyendung.com.vn
210.245.23.145	PTR	saplastic.com.vn
210.245.23.145	PTR	mail.saplastic.com.vn
210.245.23.147	A+PTR	mail.haithanh.com.vn
210.245.23.147	A+PTR	mail.tanhaithanh.com.vn
210.245.23.147	PTR	mail.tankim.com.vn
210.245.23.151	A+PTR	mail.maurilanga.com
210.245.23.153	PTR	mail.ptviet.com
210.245.23.157	PTR	host-23-xx.hcm.fpt.vn
210.245.23.159	PTR	host-23-xx.hcm.fpt.vn
210.245.23.159	A	alosua.com
210.245.23.161	A+PTR	mail.thanhnhon.com
210.245.23.161	A	www.thanhnhon.com
210.245.23.161	A	thanhnhon.com
210.245.23.162	PTR	mail.qlkdn.vn
210.245.23.168	PTR	host-23-xx.hcm.fpt.vn
210.245.23.181	PTR	host-23-xx.hcm.fpt.vn
210.245.23.192	PTR	host-23-xx.hcm.fpt.vn
210.245.23.192	A	taikhoan.yume.vn
210.245.23.192	A	apps.yume.vn
210.245.23.193	PTR	host-23-xx.hcm.fpt.vn
210.245.23.193	A	mail.muachung.com
210.245.23.193	A	www.muachung.com
210.245.23.194	PTR	host-23-xx.hcm.fpt.vn
210.245.23.194	A	dlf.vn
210.245.23.198	PTR	host-23-xx.hcm.fpt.vn
210.245.23.200	A+PTR	mail.kay.vn
210.245.23.219	PTR	host-23-xx.hcm.fpt.vn
210.245.23.221	PTR	host-23-xx.hcm.fpt.vn
210.245.23.221	A	smtp2.fptdata.net
210.245.23.248	PTR	host-23-xx.hcm.fpt.vn
210.245.23.255	PTR	host-23-xx.hcm.fpt.vn