Robtex

Up: 121.15.0.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 121.15.0.0/22
Down right: 121.15.4.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
121.15.0.152	A	gdhl95.com
121.15.0.158	A	95callcenter.com
121.15.0.237	A	www.jieshun.cn
121.15.1.2	A	www.szrtvu.com.cn
121.15.1.2	A	szrtvu.com.cn
121.15.1.58	PTR	mail.chitwing.com
121.15.1.58	A+PTR	szspam.chitwing.com
121.15.1.130	A	mail.runyang.biz
121.15.1.130	A	gw.shangkai.cc
121.15.1.130	A	mail.shang-kai.com
121.15.1.177	A	www.pingan-mail.com
121.15.1.186	A	szx.aelbkm.com
121.15.2.93	A	ns3.polymerscience.com
121.15.2.93	A	ns3.marianinc.com
121.15.2.93	A	ns3.marianasia.com
121.15.2.98	A	l-szms01.taiyi-sz.com.cn
121.15.2.98	A	smtp.taiyi-sz.com.cn
121.15.2.114	PTR	mail2.sz.usienet.com
121.15.2.114	A	usienet.com
121.15.2.131	A	btd56.com
121.15.2.131	A	btdexp.com
121.15.2.157	A	celewave.com
121.15.2.157	A	unicorn-yt.com
121.15.2.182	A	mail.xinyour.cn
121.15.2.228	A	mail.tianwangwatch.cn
121.15.2.233	A	ms1.jeangift.com
121.15.3.1	A+PTR	mail.sgopt.com
121.15.3.1	A+PTR	sbg.sgopt.com
121.15.3.148	A	huakaie.com
121.15.3.242	A	www.szyuxin.com
121.15.3.244	A	szdyjd.com
121.15.3.247	A	xn--wnua794j0zc.com
121.15.4.38	A	www.theme.com.hk
121.15.4.40	A	ascluny.com
121.15.4.40	A	as-augustsilk.com
121.15.4.92	A	mail.chinawasen.com
121.15.4.93	A	szfanhua.com
121.15.4.93	A	www.szpan-china.com
121.15.4.93	A	mail.szpan-china.com
121.15.4.117	A	www.ytzq.net
121.15.4.117	A	mail.ytzq.com
121.15.4.123	A	mail.ytzq.net
121.15.4.206	A	www.chinahuashi.com.cn
121.15.4.206	A	chinahuaxi.cn
121.15.4.206	A	mail.chinahuaxi.cn
121.15.4.216	A	mtait.cn
121.15.5.9	A	ns1.coscosz.com
121.15.5.10	A	ns2.coscosz.com
121.15.5.11	A	shpszmail.coscosz.com
121.15.5.161	A	mail.cmbcn.com.cn
121.15.5.181	A	mailtel.stcn.com
121.15.5.181	A	mailtel.zqsbs.com
121.15.5.214	A	www.tagwood.com
121.15.5.217	A	www.ceiecsz.com.cn
121.15.5.217	A	ceiecsz.com.cn
121.15.6.87	A	dnsb.ccfund.com.cn
121.15.7.9	A	mail.nanjiaosuo.com
121.15.7.10	A	mail.csrpme.com
121.15.7.11	A	mail.nanjiaosuo.com
121.15.7.44	A	szdzld.com
121.15.7.59	A	mailexchange.vsun.com
121.15.7.100	A	www.mgps.com.cn
121.15.7.119	A	www.d-telemedia.com