Robtex

Up: 123.30.212.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 123.30.213.0/25
Down right: 123.30.213.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.30.213.7	PTR	static.vdc.vn
123.30.213.7	A	choichit.com
123.30.213.7	A	luanvan.edu.vn
123.30.213.17	PTR	static.vdc.vn
123.30.213.18	PTR	mail.jdl.com.vn
123.30.213.31	PTR	static.vdc.vn
123.30.213.31	A	mail.kiu.vn
123.30.213.65	PTR	static.vdc.vn
123.30.213.66	A	thien-kiem.net
123.30.213.66	A	mail.tuvanbaohiem24h.com
123.30.213.67	PTR	213-67.static.v1server.com
123.30.213.67	A	dns5.bizmacvn.net
123.30.213.67	A	ns.chuahoangphap.com.vn
123.30.213.69	PTR	213-69.static.v1server.com
123.30.213.69	A	duongkieng.net
123.30.213.69	A	tuoitrengaynay.net
123.30.213.70	PTR	static.vdc.vn
123.30.213.72	A	www.dieuam.net
123.30.213.72	A	mail.phapamthuongchuyen.com
123.30.213.72	A	duonganhpaint.com
123.30.213.85	A	www.dcselab.edu.vn
123.30.213.85	A	hoangkiem.net
123.30.213.85	A	vimeeting.net
123.30.213.86	PTR	213-86.static.v1server.com
123.30.213.86	A	minhchinh.us
123.30.213.86	A	xosominhchinh.com
123.30.213.87	PTR	static.vdc.vn
123.30.213.87	A	mail.quiphuc.com
123.30.213.87	A	mail.kekhohang.com
123.30.213.88	A	ns.vncphathoc.com
123.30.213.88	A	mail.vncphathoc.com
123.30.213.88	A	vncphathoc.com
123.30.213.90	A	www.vitquayphatthanh.com
123.30.213.100	PTR	213-100.static.v1server.com
123.30.213.100	A	mail.dongthanhceramic.com
123.30.213.100	A	dns2.bizmacvn.net
123.30.213.104	PTR	213-104.static.v1server.com
123.30.213.104	PTR	mail.bizmac.com.vn
123.30.213.104	A	213-67.static.v1server.com
123.30.213.146	PTR	mail.like.vn
123.30.213.166	PTR	static.vdc.vn
123.30.213.166	A	www.vnfun.vn
123.30.213.166	A	mail.vnfun.vn
123.30.213.188	PTR	static.vdc.vn
123.30.213.188	A	mail.krems.edu.vn
123.30.213.189	PTR	static.vdc.vn
123.30.213.203	PTR	static.vdc.vn
123.30.213.203	A	ns3.gslb.jobstreet.com.my
123.30.213.211	PTR	static.vdc.vn
123.30.213.213	PTR	static.vdc.vn
123.30.213.213	A	job-search.gslb.jobstreet.com.sg
123.30.213.213	A	job-search.gslb.jobstreet.com.ph
123.30.213.215	PTR	static.vdc.vn
123.30.213.215	A	www.gslb.jobstreet.co.id
123.30.213.215	A	www.jobstreet.co.th
123.30.213.216	PTR	static.vdc.vn
123.30.213.216	A	www-home.gslb.jobstreet.com
123.30.213.218	PTR	static.vdc.vn
123.30.213.218	A	m.jobstreet.com