Robtex

Up: 221.238.12.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 221.238.13.0/25
Down right: 221.238.13.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
221.238.13.7	PTR	7.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.26	PTR	26.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.55	PTR	55.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.72	PTR	72.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.82	PTR	82.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.82	A	bh.gov.cn
221.238.13.82	A	www.bh.gov.cn
221.238.13.83	PTR	83.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.83	A	bhitv.com.cn
221.238.13.83	A	bhitv.cn
221.238.13.84	PTR	84.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.84	A	www.tjbh.com
221.238.13.84	A	tjbh.com
221.238.13.87	PTR	87.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.87	A	bhxqxst.com
221.238.13.87	A	bhsx.org
221.238.13.95	PTR	95.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.122	PTR	122.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.123	A	mail.taibiao.com
221.238.13.123	A	taibiao.com
221.238.13.126	PTR	126.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.126	A	tbfw.com
221.238.13.126	A	tedaf.com
221.238.13.171	PTR	171.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.207	PTR	207.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.226	PTR	226.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.228	PTR	228.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.228	A	dxarray.unitedbank.cn
221.238.13.230	PTR	230.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.231	PTR	231.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.233	PTR	233.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.238	PTR	238.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.240	PTR	240.13.238.221.broad.tj.tj.dynamic.163data.com.cn
221.238.13.250	PTR	250.13.238.221.broad.tj.tj.dynamic.163data.com.cn