Robtex

Up: 124.42.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 124.42.12.0/23
Down right: 124.42.14.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
124.42.12.77	A	test.tupu360.com
124.42.12.81	PTR	mail.dragonip.com
124.42.12.81	PTR	smtp.dragonip.com
124.42.12.81	PTR	mail.dragon-patent.com.cn
124.42.13.14	PTR	smtpav.travelsky.com
124.42.13.14	A	mailb.travelsky.com
124.42.13.14	A	mailb.caacnet.com
124.42.13.25	A	pop3.travelsky.com
124.42.13.57	A+PTR	smtpav.travelsky.com
124.42.13.57	A	maila.caacnet.com
124.42.13.57	A	mailgate.travelsky.com
124.42.13.77	PTR	mail.travelsky.com
124.42.13.82	A	pop3.travelsky.com
124.42.13.82	A	mail.travelsky.com
124.42.13.197	A	vpn.travelsky.com
124.42.15.30	PTR	dilato-exs.dilatoit.com
124.42.15.30	PTR	email.dilatoit.com
124.42.15.36	A	gzlib.org
124.42.15.68	A	idecl.cn
124.42.15.69	A	jf.ninetowns.com
124.42.15.73	A	idecl.cn
124.42.15.75	A	91eport.com
124.42.15.78	A	e-port.com.cn
124.42.15.85	A	ns0.tootoomart.com
124.42.15.85	A	ns1.whois-inc.net
124.42.15.85	A	ns.whois-inc.net
124.42.15.90	A	meetandband.com
124.42.15.105	A	deguozhanlan.com
124.42.15.105	A	log.whois-inc.net
124.42.15.106	A	idecl.com
124.42.15.116	A	9ctong.com
124.42.15.125	A	www.ninetowns.cn
124.42.15.135	A	icsp.cn
124.42.15.135	A	www.e-port.cn
124.42.15.154	A	e-port.cn
124.42.15.163	PTR	adechina.com
124.42.15.165	PTR	adechina.com
124.42.15.165	PTR	mail.adechina.com
124.42.15.171	A	adechina.com.cn
124.42.15.178	A+PTR	mail.foundationcenter.cn
124.42.15.178	PTR	mail.cctf.org.cn
124.42.15.178	PTR	mail.crcf.org.cn
124.42.15.179	PTR	mail.ddaiya.cn
124.42.15.179	PTR	mail.gdhope.cn
124.42.15.179	PTR	mail.nandufoundation.org
124.42.15.180	A	157823.cn
124.42.15.180	A	5fwealthconsulting.com
124.42.15.180	A	pb360.cn
124.42.15.186	A	www.crcf.org.cn
124.42.15.187	A	mail.xingongmin.com
124.42.15.187	A	mail.naradafoundation.org
124.42.15.187	A	yibaohr.com
124.42.15.196	A	dhgate.com.cn
124.42.15.196	A	dhgate.cn
124.42.15.198	A	s102-www.dhgate.com
124.42.15.198	A	*.dhgate.com
124.42.15.200	A	survey.dhgate.com
124.42.15.201	A	bupload.dhgate.com
124.42.15.216	A	search.dhgate.com
124.42.15.218	A	blog.dhgate.com
124.42.15.218	A	dhport.com.cn
124.42.15.218	A	blog.dhgate.cn
124.42.15.236	A	agent.dhgate.com
124.42.15.243	A	wangshutong.com.cn