Robtex

Up: 164.100.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 164.100.16.0/23
Down right: 164.100.18.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
164.100.16.40	PTR	davp.nic.in
164.100.16.254	A+PTR	meacpv.nic.in
164.100.17.3	A+PTR	ns4.nic.in
164.100.17.5	A	pppdel.nic.in
164.100.17.6	PTR	alpha.nic.in
164.100.17.7	PTR	vastu1.nic.in
164.100.17.11	PTR	switch.nic.in
164.100.17.11	A	suraj.mit.gov.in
164.100.17.12	A	vastu.nic.in
164.100.17.12	A	vastu1.nic.in
164.100.17.12	A	vastu3.nic.in
164.100.17.13	PTR	smtpgw.nic.in
164.100.17.13	A	vastu.nic.in
164.100.17.13	A	vastu1.nic.in
164.100.17.14	PTR	ias.nic.in
164.100.17.14	PTR	smtpgw.nic.in
164.100.17.14	A	vastu.nic.in
164.100.17.17	PTR	vastu.nic.in
164.100.17.17	A	relay1.nic.in
164.100.17.19	A+PTR	afa.nic.in
164.100.17.20	A+PTR	edumail.nic.in
164.100.17.21	A	tradeniconline.nic.in
164.100.17.21	A	markinfo.nic.in
164.100.17.21	A	trade.nic.in
164.100.17.22	PTR	minpers.nic.in
164.100.17.24	A	stio.nic.in
164.100.17.25	A	passportstatus.nic.in
164.100.17.28	PTR	cpwdsewa.nic.in
164.100.17.29	A	servicetaxefiling.nic.in
164.100.17.31	A	adalat.nic.in
164.100.17.33	A+PTR	ebillpost.gov.in
164.100.17.33	A	www.ebillpost.gov.in
164.100.17.60	A	ldap2.nic.in
164.100.17.93	PTR	servicetaxefiling.nic.in
164.100.17.94	PTR	cup.ac.in
164.100.17.94	PTR	hnbgu.ac.in
164.100.17.94	PTR	landmark.ac.in
164.100.17.96	A+PTR	relay-back.nic.in
164.100.17.102	PTR	cghs.nic.in
164.100.17.111	PTR	egrains.nic.in
164.100.17.252	A	csg.nic.in
164.100.18.31	A	intramopr.nic.in
164.100.18.34	A	rni.gov.in
164.100.18.34	A	www.rni.gov.in
164.100.18.35	A	jnnurmmis.nic.in
164.100.18.41	A	lrms.nic.in
164.100.19.2	A+PTR	cyber_gateway.nic.in
164.100.19.3	PTR	delhi.nic.in
164.100.19.3	A	cyber.nic.in