Robtex

Up: 203.122.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.122.52.0/23
Down right: 203.122.54.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.122.53.8	PTR	valcaremail.com
203.122.53.10	PTR	valuehealthmail.com
203.122.53.25	A	mail.itfinity.net
203.122.53.69	PTR	homail.abacusperipherals.com
203.122.53.113	PTR	webmail.banburyindia.com
203.122.53.114	PTR	abacusperipherals.com
203.122.54.16	PTR	203.122.54.16.reverse.spectranet.in
203.122.54.20	PTR	203.122.54.20.reverse.spectranet.in
203.122.54.20	A	acsinc-ind.com
203.122.54.34	PTR	203.122.54.34.reverse.spectranet.in
203.122.54.36	PTR	203.122.54.36.reverse.spectranet.in
203.122.54.36	A	www.gmfabrics.com
203.122.54.36	A	gmfabrics.com
203.122.54.38	PTR	203.122.54.38.reverse.spectranet.in
203.122.54.38	A	homesfurnishings.in
203.122.54.45	PTR	mail.verchaska.com
203.122.54.52	PTR	203.122.54.52.reverse.spectranet.in
203.122.54.66	PTR	203.122.54.66.reverse.spectranet.in
203.122.54.76	PTR	mail2.kamaschachter.com
203.122.54.163	A+PTR	vpn.aidem.in
203.122.54.164	A	mis.aidem.in
203.122.54.165	A+PTR	ftp.aidem.in
203.122.54.166	A+PTR	webmail.aidem.in
203.122.54.167	A	ingatemx02.aidem.in
203.122.54.169	A+PTR	ingatemx03.zirca.in
203.122.54.250	PTR	203.122.54.250.reverse.spectranet.in
203.122.54.250	A	occ-1-2161-2164.1.nflxso.net
203.122.54.250	A	occ-2-2161-2164.1.nflxso.net
203.122.54.252	PTR	203.122.54.252.reverse.spectranet.in
203.122.54.252	A	occ-1-2161-2164.1.nflxso.net
203.122.54.252	A	occ-2-2161-2164.1.nflxso.net
203.122.55.101	PTR	203.122.55.101.reverse.spectranet.in
203.122.55.131	PTR	ras.vol.net.in
203.122.55.132	A	pm.verchaska.com
203.122.55.135	A	mail.verchaska.com
203.122.55.140	A	ns2.urnetspace.com
203.122.55.163	PTR	mail.s-amit.com
203.122.55.204	PTR	203.122.55.204.reverse.spectranet.in
203.122.55.204	A	thediamonds.in
203.122.55.210	A+PTR	bofw01.rdmipl.com
203.122.55.213	A	mail.mosindia.biz