Robtex

Up: 123.103.4.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 123.103.4.0/24
Down right: 123.103.5.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.103.4.14	PTR	123.103.4.14-bj-cnc
123.103.4.58	PTR	123.103.4.58-bj-cnc
123.103.4.65	PTR	123.103.4.65-bj-cnc
123.103.4.83	PTR	123.103.4.83-bj-cnc
123.103.4.122	PTR	123.103.4.122-bj-cnc
123.103.4.132	PTR	123.103.4.132-bj-cnc
123.103.4.142	PTR	123.103.4.142-bj-cnc
123.103.4.154	PTR	123.103.4.154-bj-cnc
123.103.4.160	PTR	123.103.4.160-bj-cnc
123.103.4.161	PTR	123.103.4.161-bj-cnc
123.103.4.166	PTR	123.103.4.166-bj-cnc
123.103.4.167	PTR	123.103.4.167-bj-cnc
123.103.4.170	PTR	123.103.4.170-bj-cnc
123.103.4.173	PTR	123.103.4.173-bj-cnc
123.103.4.177	PTR	123.103.4.177-bj-cnc
123.103.4.187	PTR	123.103.4.187-bj-cnc
123.103.4.207	PTR	123.103.4.207-bj-cnc
123.103.4.210	PTR	123.103.4.210-bj-cnc
123.103.4.215	PTR	123.103.4.215-bj-cnc
123.103.4.234	PTR	123.103.4.234-bj-cnc
123.103.4.243	PTR	123.103.4.243-bj-cnc
123.103.4.245	PTR	123.103.4.245-bj-cnc
123.103.4.247	PTR	123.103.4.247-bj-cnc
123.103.5.4	PTR	123.103.5.4-bl-cnc
123.103.5.9	PTR	123.103.5.9-bj-cnc
123.103.5.14	PTR	123.103.5.14-bj-cnc
123.103.5.37	PTR	123.103.5.37-bj-cnc
123.103.5.47	PTR	123.103.5.47-bj-cnc
123.103.5.50	PTR	123.103.5.50-bj-cnc
123.103.5.53	PTR	123.103.5.53-bj-cnc
123.103.5.61	A	weibang.youth.cn
123.103.5.67	PTR	123.103.5.67-bj-cnc
123.103.5.75	PTR	123.103.5.75-bj-cnc
123.103.5.76	A	uga.youth.cn
123.103.5.77	PTR	123.103.5.77-bj-cnc
123.103.5.78	PTR	123.103.5.78-bj-cnc
123.103.5.78	A	h5special.youth.cn
123.103.5.82	PTR	123.103.5.82-bj-cnc
123.103.5.86	PTR	123.103.5.86-bj-cnc
123.103.5.86	A	mailgw.youth.cn
123.103.5.87	PTR	123.103.5.87-bj-cnc
123.103.5.87	A	sunyunxiao.youth.cn
123.103.5.87	A	club.youth.cn
123.103.5.89	A	dream.qnzz.youth.cn
123.103.5.92	A	zhtjdemo.youth.cn
123.103.5.92	A	zhtjpreview.youth.cn
123.103.5.94	PTR	123.103.5.94-bj-cnc
123.103.5.94	A	qwcs.youth.cn
123.103.5.94	A	jiance.youth.cn
123.103.5.96	PTR	123.103.5.96-bj-cnc
123.103.5.97	PTR	123.103.5.97-bj-cnc
123.103.5.99	PTR	123.103.5.99-bj-cnc
123.103.5.108	A	bfd.statistics.qnzs.youth.cn
123.103.5.109	A	bfdservice.statistics.qnzs.youth.cn
123.103.5.119	PTR	123.103.5.119-bj-cnc
123.103.5.129	PTR	123.103.5.129-bj-cnc
123.103.5.133	PTR	123.103.5.133-bj-cnc
123.103.5.151	PTR	123.103.5.151-bj-cnc
123.103.5.163	PTR	123.103.5.163-bj-cnc
123.103.5.169	PTR	123.103.5.169-bj-cnc
123.103.5.187	PTR	123.103.5.187-bj-cnc
123.103.5.190	PTR	123.103.5.190-bj-cnc
123.103.5.195	PTR	123.103.5.195-bj-cnc
123.103.5.208	PTR	123.103.5.208-bj-cnc
123.103.5.220	PTR	123.103.5.220-bj-cnc
123.103.5.234	PTR	123.103.5.234-bj-cnc
123.103.5.235	PTR	123.103.5.235-bj-cnc