Robtex

Up: 211.153.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 211.153.20.0/25
Down right: 211.153.20.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
211.153.20.1	A	rdfz.bjedu.gov.cn
211.153.20.2	PTR	bgy.org.cn
211.153.20.4	PTR	fee.bjedu.com.cn
211.153.20.5	A	hryz.bjedu.gov.cn
211.153.20.6	PTR	jtdx.com.cn
211.153.20.6	PTR	mail.jtdx.com.cn
211.153.20.6	A	jtdx.bjedu.gov.cn
211.153.20.7	PTR	wydz.bjedu.gov.cn
211.153.20.8	PTR	mail.erwai.net.cn
211.153.20.8	PTR	pop3.erwai.net.cn
211.153.20.8	PTR	smtp.erwai.net.cn
211.153.20.10	PTR	dxedu.gov.cn
211.153.20.14	A	bac.bjedu.gov.cn
211.153.20.16	A	chinawsyjk.mobi
211.153.20.16	A	wsyjk.org
211.153.20.23	A	mail3.bjedu.com.cn
211.153.20.24	A+PTR	mail4.bjedu.com.cn
211.153.20.30	PTR	langf.com
211.153.20.30	PTR	ftp.langf.com
211.153.20.30	PTR	mail.langf.com
211.153.20.46	A	syfz.bjedu.gov.cn
211.153.20.47	A	mail.syfz.bjedu.gov.cn
211.153.20.48	A+PTR	hyczx.bjedu.gov.cn
211.153.20.53	PTR	search.bjedu.gov.cn
211.153.20.88	A	mailtest.bjedu.gov.cn
211.153.20.96	A	zhuangao.com
211.153.20.96	A	tenniscn.com
211.153.20.96	A	hongyao.com
211.153.20.104	A	www.myedu.edu.cn
211.153.20.104	A	myedu.edu.cn
211.153.20.125	A	becom-lz.becom.com.cn
211.153.20.139	A	bjadc.edu.cn
211.153.20.139	A	usrn.edu.cn
211.153.20.149	A	study.bjedu.gov.cn
211.153.20.150	PTR	mail.chy.bjedu.cn
211.153.20.159	PTR	mail.chy.bjedu.cn
211.153.20.177	A	www.zhnet.com.cn