Robtex

Up: 211.157.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 211.157.16.0/22
Down right: 211.157.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
211.157.16.22	PTR	ifas-server.ifas-asia.com
211.157.16.42	PTR	mail.metabo.com.cn
211.157.16.89	PTR	cnmail01.metabo.com.cn
211.157.16.89	PTR	owa.metabo.com.cn
211.157.16.115	A	mx.py-axa.com
211.157.16.115	A	mx.pyaxa.com
211.157.16.115	A	mx.pyas-im.com
211.157.16.130	A+PTR	www.keeco.com.cn
211.157.16.166	PTR	cybermart.com.cn
211.157.16.166	PTR	kantron.com.cn
211.157.17.26	PTR	adata.com.cn
211.157.17.34	A+PTR	mail.maxim-group.com.cn
211.157.17.34	A	ns.maxim-group.com.cn
211.157.17.42	PTR	42.evermaxglobal.com
211.157.17.46	A+PTR	ms.evermaxglobal.com
211.157.17.46	A	014199052139.ctinets.com
211.157.17.46	A	dns.cosmos-gift.com
211.157.17.219	A	sirva.com.cn
211.157.18.188	A	xn--knstlergarderobe-jzb.de
211.157.18.188	A	para-nj.com.cn
211.157.18.214	A	mmimsshanghai.net
211.157.19.4	A	4688.com.cn
211.157.19.11	PTR	hbweb.poocan.com
211.157.19.82	A	www.qq-china.com
211.157.19.82	A	qq-china.com
211.157.19.108	PTR	cybermart.com.cn
211.157.19.246	A	mx1.shgerald.com
211.157.20.4	PTR	211.157.20.4.static.in-addr.arpa
211.157.20.16	PTR	211.157.20.16.static.in-addr.arpa
211.157.20.67	PTR	211.157.20.67.static.in-addr.arpa
211.157.20.74	PTR	211.157.20.74.static.in-addr.arpa
211.157.20.81	PTR	211.157.20.81.static.in-addr.arpa
211.157.20.113	PTR	211.157.20.113.static.in-addr.arpa
211.157.20.131	PTR	211.157.20.131.static.in-addr.arpa
211.157.21.103	A	woodscience.org
211.157.21.105	A	ms1china.dyned.com
211.157.22.130	PTR	211.157.22.130.static.in-addr.arpa
211.157.22.130	A	ns2.emedexchange.com
211.157.22.249	PTR	211.157.22.249.static.in-addr.arpa