Robtex

Up: 58.251.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 58.251.80.0/23
Down right: 58.251.82.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
58.251.80.11	PTR	reverse.gdsz.cncnet.net
58.251.80.100	PTR	reverse.gdsz.cncnet.net
58.251.80.101	PTR	reverse.gdsz.cncnet.net
58.251.80.101	A	wlgee.com
58.251.80.107	PTR	reverse.gdsz.cncnet.net
58.251.80.109	PTR	reverse.gdsz.cncnet.net
58.251.80.122	PTR	reverse.gdsz.cncnet.net
58.251.80.167	PTR	reverse.gdsz.cncnet.net
58.251.80.167	A	m4.tencent.com
58.251.80.192	PTR	reverse.gdsz.cncnet.net
58.251.80.192	A	aicstest.qq.com
58.251.80.192	A	aics.qq.com
58.251.80.193	PTR	reverse.gdsz.cncnet.net
58.251.80.193	A	hn8-pp.lol.qq.com
58.251.80.193	A	pictures.qq.com
58.251.80.195	PTR	reverse.gdsz.cncnet.net
58.251.80.212	PTR	reverse.gdsz.cncnet.net
58.251.80.212	A	test.sdkapi.tu.qq.com
58.251.80.213	A	safe.qq.com
58.251.80.218	PTR	reverse.gdsz.cncnet.net
58.251.80.218	A	ssr.sy.qq.com
58.251.80.229	PTR	reverse.gdsz.cncnet.net
58.251.80.233	PTR	reverse.gdsz.cncnet.net
58.251.80.233	A	qpay.tenpay.com
58.251.80.234	PTR	reverse.gdsz.cncnet.net
58.251.80.234	A	ue.qq.com
58.251.80.234	A	mi.ssp.qq.com
58.251.80.237	PTR	reverse.gdsz.cncnet.net
58.251.81.4	PTR	reverse.gdsz.cncnet.net
58.251.81.16	PTR	reverse.gdsz.cncnet.net
58.251.81.16	A	ztcl1.tcdnlive.com
58.251.81.16	A	ztcl1.cdntip.com
58.251.81.17	PTR	reverse.gdsz.cncnet.net
58.251.81.17	A	patrol.tencent.com
58.251.81.18	PTR	reverse.gdsz.cncnet.net
58.251.81.18	A	ztcl2.tcdnlive.com
58.251.81.26	PTR	reverse.gdsz.cncnet.net
58.251.81.26	A	code.tencent.com
58.251.81.26	A	uni.weixiao.qq.com
58.251.81.27	A	hn17-cap.lol.qq.com
58.251.81.35	A	einvoice.tencent.com
58.251.81.36	PTR	reverse.gdsz.cncnet.net
58.251.81.36	A	sisa.tencent.com
58.251.81.37	A	op.tga.qq.com
58.251.81.37	A	app.tga.qq.com
58.251.81.45	PTR	reverse.gdsz.cncnet.net
58.251.81.45	A	hn17-pp.lol.qq.com
58.251.81.45	A	hn8-emote.lol.qq.com
58.251.81.46	PTR	reverse.gdsz.cncnet.net
58.251.81.48	A	gyg.qq.com
58.251.81.52	PTR	reverse.gdsz.cncnet.net
58.251.81.52	A	imgs-30016.sz.gfp.tencent-cloud.com
58.251.81.52	A	production-30231.sz.gfp.tencent-cloud.com
58.251.81.103	PTR	reverse.gdsz.cncnet.net
58.251.81.107	PTR	reverse.gdsz.cncnet.net
58.251.81.114	PTR	reverse.gdsz.cncnet.net
58.251.81.151	PTR	reverse.gdsz.cncnet.net
58.251.81.176	PTR	reverse.gdsz.cncnet.net
58.251.81.183	PTR	reverse.gdsz.cncnet.net
58.251.81.183	A	ws.huanle.qq.com
58.251.81.183	A	cgi.huanle.qq.com
58.251.81.184	PTR	reverse.gdsz.cncnet.net
58.251.81.184	A	hn11-cap.lol.qq.com
58.251.81.184	A	hn17-emote.lol.qq.com
58.251.81.190	PTR	reverse.gdsz.cncnet.net
58.251.81.190	A	wings.wegame.com
58.251.81.190	A	mvs.qq.com
58.251.81.192	A	ztcl6.tcdnlive.com
58.251.81.193	PTR	reverse.gdsz.cncnet.net
58.251.81.193	A	ninja.qq.com
58.251.81.193	A	hrec.sdc.qq.com
58.251.81.194	PTR	reverse.gdsz.cncnet.net
58.251.81.197	PTR	reverse.gdsz.cncnet.net
58.251.81.197	A	panda.qq.com
58.251.81.197	A	easytest.qq.com
58.251.81.198	PTR	reverse.gdsz.cncnet.net
58.251.81.198	A	huiyin.qq.com
58.251.81.200	A	labeling.qq.com
58.251.81.203	PTR	reverse.gdsz.cncnet.net
58.251.81.203	A	upload.rz.qq.com
58.251.81.204	A	kingsman-control.qq.com
58.251.81.205	A	zgxq.qq.com
58.251.81.216	PTR	reverse.gdsz.cncnet.net
58.251.81.216	A	sportsnba.qq.com
58.251.81.216	A	download.bill.weixin.qq.com
58.251.81.218	A	bbs.raz.qq.com
58.251.81.221	A	ec.flzhan.cn
58.251.81.221	A	tacc.qq.com
58.251.81.222	PTR	reverse.gdsz.cncnet.net
58.251.81.222	A	log.node.minigame.qq.com
58.251.81.223	PTR	reverse.gdsz.cncnet.net
58.251.81.223	A	nextradio.qq.com
58.251.82.156	PTR	reverse.gdsz.cncnet.net
58.251.82.156	A	ns1.tencdns.com
58.251.82.174	PTR	reverse.gdsz.cncnet.net
58.251.82.174	A	imgs-30016.sz.gfp.tencent-cloud.com
58.251.82.174	A	production-30231.sz.gfp.tencent-cloud.com
58.251.82.180	PTR	reverse.gdsz.cncnet.net
58.251.82.189	PTR	reverse.gdsz.cncnet.net
58.251.82.189	A	hello.qq.com
58.251.82.189	A	rpt.gdt.qq.com
58.251.82.192	PTR	reverse.gdsz.cncnet.net
58.251.82.192	A	sec.tencent.com
58.251.82.192	A	haoya.qq.com
58.251.82.195	PTR	reverse.gdsz.cncnet.net
58.251.82.195	A	xindong.qq.com
58.251.82.195	A	mockwebdev.qq.com
58.251.82.197	PTR	reverse.gdsz.cncnet.net
58.251.82.205	A	smtp.exmail.qq.com
58.251.82.205	A	imap.exmail.qq.com
58.251.83.23	PTR	reverse.gdsz.cncnet.net
58.251.83.39	PTR	reverse.gdsz.cncnet.net
58.251.83.115	PTR	reverse.gdsz.cncnet.net
58.251.83.144	PTR	reverse.gdsz.cncnet.net
58.251.83.153	PTR	reverse.gdsz.cncnet.net
58.251.83.212	PTR	reverse.gdsz.cncnet.net
58.251.83.233	PTR	reverse.gdsz.cncnet.net
58.251.83.235	PTR	reverse.gdsz.cncnet.net