Robtex

Up: 218.16.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 218.16.48.0/21
Down right: 218.16.56.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
218.16.48.3	PTR	3.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.33	PTR	33.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.34	PTR	34.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.35	PTR	35.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.51	PTR	51.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.82	PTR	82.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.96	PTR	96.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.97	PTR	97.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.98	PTR	98.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.130	PTR	130.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.146	PTR	146.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.147	PTR	147.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.163	PTR	163.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.176	PTR	176.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.178	PTR	178.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.195	PTR	195.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.209	PTR	209.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.224	PTR	224.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.48.241	PTR	241.48.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.49.248	PTR	248.49.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.49.248	A	qtjianfu.com
218.16.50.150	PTR	150.50.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.50.165	PTR	165.50.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.51.173	PTR	173.51.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.51.240	PTR	240.51.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.52.49	PTR	49.52.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.53.26	PTR	26.53.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.53.78	PTR	78.53.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.53.194	PTR	194.53.16.218.broad.dg.gd.dynamic.163data.com.cn
218.16.56.117	A	mail.junyudg.com
218.16.57.13	A	mail.meacm.com
218.16.57.23	A	linkconceptdg.com
218.16.57.51	A	mail.xxyoa.com
218.16.57.107	A	bazijing.com
218.16.57.107	A	dgarai.com
218.16.57.107	A	mail.dgarai.com
218.16.57.130	A	mail.charmingclothing.com
218.16.57.168	A	xffltd.com
218.16.57.176	A+PTR	mail.mtworld.cn
218.16.57.176	A	mail.xiaogutek.com
218.16.57.176	A	mtworld.cn
218.16.57.182	A	build-deal-time.cz.cc
218.16.58.38	A	kingyou.cn
218.16.58.140	A	mail.yinglishoes.com
218.16.58.143	A	supreme-lab.net
218.16.58.143	A	mail.supreme-lab.net
218.16.58.154	A	mail.mingleurn.com
218.16.58.154	A	mail.mingyoung-fashion.com
218.16.58.154	A	mingleurn.com
218.16.58.175	A	mail.unilight.com.tw
218.16.58.175	A	mail.luxtaltek.com
218.16.58.219	A	mail.promond.it
218.16.58.236	A	pop.gw160.com
218.16.58.236	A	mail.gw160.com
218.16.58.236	A	mail.luxurycatalanvilla.com
218.16.59.79	A	mail.gosunm.com
218.16.60.7	PTR	jtdm.com.cn
218.16.60.7	A	mail.jtdm.com.cn
218.16.60.23	A	ulight123.com
218.16.60.168	A	mail.konglighting.cn
218.16.60.173	A	hexindz.net
218.16.61.54	A	mart99.com
218.16.61.54	A	pcguard.com
218.16.61.87	A	ipp2p.com
218.16.61.87	A	helloipc.com
218.16.61.91	A	well-chart.com.cn
218.16.61.91	A	spmelectric.com.cn
218.16.61.99	PTR	ampacsgc.com.cn
218.16.61.99	PTR	yixintek.com
218.16.61.99	A	mx1.yixintek.com
218.16.61.141	A	skylink.cn
218.16.61.155	A+PTR	mail.i-ideal.com
218.16.61.155	A	mail.alanxie.net
218.16.61.245	A	yuonyunn.com
218.16.61.245	A	fuyunn.com
218.16.62.36	A	mail.hzimp.com
218.16.62.36	A	hzimp.com
218.16.62.45	A	mail.bt.cn
218.16.62.90	A	evalogik.com
218.16.62.126	A	mail1.bestquality.com.cn
218.16.62.149	A	jiedaxing.net
218.16.62.149	A	jiedaxing.com
218.16.62.177	A	dgchunyi.cn
218.16.62.183	A	kerneldg.com
218.16.62.203	A	mail.mimumi.com
218.16.62.231	A	dgsbd.cn
218.16.63.10	A+PTR	mailsecure.willis.com.cn
218.16.63.26	A	dglongjoin.com
218.16.63.26	A	mail.szlongjoin.com
218.16.63.26	A	longjoingroup.com
218.16.63.27	PTR	mail.longjoingroup.com
218.16.63.30	PTR	longjoin.cn
218.16.63.30	PTR	dglongjoin.com
218.16.63.30	PTR	szlongjoin.com
218.16.63.36	A	mail.dggpsw.cn
218.16.63.143	A	ccdgut.net
218.16.63.143	A	ccdgut.org
218.16.63.150	A	hongfaedu.com
218.16.63.155	A	dns2.ccdgut.edu.cn
218.16.63.156	A	dns22.ccdgut.com
218.16.63.156	A	dns21.ccdgut.com
218.16.63.211	A	ms1.zydio.com
218.16.63.211	A	zhongyu.win2.cn
218.16.63.211	A	ms2.zydio.com