Robtex

Up: 121.243.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 121.243.16.0/21
Down right: 121.243.24.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
121.243.16.210	A+PTR	relay.go4hosting.in
121.243.16.210	A	newsletter1.go4hosting.in
121.243.16.211	A	relay.go4hosting.in
121.243.16.212	A	relay.go4hosting.in
121.243.16.214	A	ns22.goforhosting.com
121.243.16.214	A	mailgateway.cyfuture.com
121.243.17.2	PTR	121.243.17.2.static-delhi.vsnl.net.in
121.243.18.2	PTR	121.243.18.2.static-delhi.vsnl.net.in
121.243.19.80	PTR	121.243.19.80.static-delhi.vsnl.net.in
121.243.19.162	PTR	121.243.19.162.static-delhi.vsnl.net.in
121.243.22.130	PTR	121.243.22.130.static-delhi.vsnl.net.in
121.243.22.135	A	vmscanus.firstnaukri.com
121.243.22.135	A	vmscanus.motozig.com
121.243.22.135	A	vmscanus.naukri.com
121.243.22.144	PTR	avasin.naukri.com
121.243.22.145	PTR	avasin.naukri.com
121.243.22.150	PTR	delhtca03.naukri.com
121.243.22.150	A	exht01.infoedge.com
121.243.22.151	PTR	delhtca03.naukri.com
121.243.22.151	A	exht01.infoedge.com
121.243.22.151	A	resumeservices.naukri.com
121.243.22.152	A	delhtca02.naukri.com
121.243.22.152	A	excas1.infoedge.com
121.243.22.153	A	delhtca02.naukri.com
121.243.22.153	A	excas1.infoedge.com
121.243.22.169	A	excas2.infoedge.com
121.243.22.171	A	mail01.strikebig.info
121.243.22.171	A	resumepedia.naukri.com
121.243.22.172	A	mail.strikebig.net
121.243.22.176	PTR	121.243.22.176.static-delhi.vsnl.net.in
121.243.22.176	A	autodiscover.naukri.com
121.243.22.176	A	mail.infoedge.com
121.243.22.178	A	excas2.infoedge.com
121.243.22.230	A	ns2.niit-tech.in
121.243.22.231	A	ns1.niit-tech.in
121.243.22.231	A	noida-ch-dns1.niit-tech.in
121.243.22.238	A	mail3.niit-tech.com
121.243.22.241	A	careers.niit-tech.com
121.243.22.250	A	llb1dc.niit-tech.com
121.243.22.253	A	mail3.niit-tech.in
121.243.24.124	PTR	www.chitalegroup.co.in
121.243.26.34	PTR	121.243.26.34.static-delhi.vsnl.net.in
121.243.26.37	A	dns1.persistent.co.in
121.243.26.39	A	dns4.persistent.co.in
121.243.26.39	A	ns4.persistent.co.in
121.243.26.45	A	webmailnagpur.persistent.co.in
121.243.26.50	PTR	mx2.persistent.co.in
121.243.26.96	PTR	121.243.26.96.static-delhi.vsnl.net.in
121.243.26.96	A	idalabs.com
121.243.26.105	A	tomocomo.com
121.243.26.106	A	xubaudio.com
121.243.26.109	A	justdabbas.com
121.243.26.230	A	pun-vpn.allscripts.com
121.243.29.87	PTR	mailrelay1.corrtech.in
121.243.29.87	A	postmaster.controlplus.in
121.243.29.88	PTR	mailrelay2.corrtech.in