Robtex

Up: 211.81.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 211.81.20.0/23
Down right: 211.81.22.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
211.81.20.200	A	dns1.tjmec.gov.cn
211.81.20.200	A	dns1.tj.edu.cn
211.81.20.201	A	dns2.tj.edu.cn
211.81.20.201	A	dns2.tjmec.gov.cn
211.81.20.208	A	jhdfd.tj.edu.cn
211.81.20.208	A	jh.tj.edu.cn
211.81.20.208	A	jhxzz.tj.edu.cn
211.81.21.197	A	tjyywz.com
211.81.21.197	A	www.tjyywz.com
211.81.22.17	A	tjte.org
211.81.22.18	A	www.tj.edu.cn
211.81.22.19	A	www.tj.edu.cn
211.81.22.19	A	northedu.org
211.81.22.31	A	tjbys.com.cn
211.81.22.31	A	tjbys.cn
211.81.22.31	A	www.tjbys.com.cn
211.81.22.43	A	nh5.tj.edu.cn
211.81.22.43	A	hboa.tj.edu.cn
211.81.22.43	A	jnszz.tj.edu.cn
211.81.22.50	A	northedu.cn
211.81.22.50	A	northedu.com.cn
211.81.22.51	A	www.noredu.net
211.81.22.51	A	noredu.net
211.81.22.58	A	tjei.cn
211.81.22.62	A	www.tjmec.gov.cn
211.81.22.80	A	www.tjgspx.cn
211.81.22.85	A	tjsyxx.com.cn
211.81.22.91	A	hedong2you.com
211.81.22.96	A	www.tjyz.org
211.81.22.98	A	tjjky.tj.edu.cn