Robtex

Up: 217.30.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 217.30.248.0/22
Down right: 217.30.252.0/22

IP	Type	Hostname
217.30.248.63	PTR	static-host.63-248-30-217.tatintel.com
217.30.248.64	PTR	static-host.64-248-30-217.tatintel.com
217.30.248.67	PTR	tatarstan.aero
217.30.248.67	PTR	mail.tatarstan.aero
217.30.248.135	PTR	demon.tts.ru
217.30.248.135	A	peugeot-tts.ru
217.30.248.162	PTR	static-host.162-248-30-217.tatintel.com
217.30.248.162	A	kuznech-dvor.ru
217.30.249.63	PTR	static-host.63-249-30-217.tatintel.com
217.30.249.64	PTR	static-host.64-249-30-217.tatintel.com
217.30.249.71	PTR	static-host.71-249-30-217.tatintel.com
217.30.249.72	PTR	static-host.72-249-30-217.tatintel.com
217.30.249.98	A+PTR	oilpro.ru
217.30.249.98	A	maila.oilpro.ru
217.30.249.99	A+PTR	oilpro.ru
217.30.249.99	A	maila.oilpro.ru
217.30.249.106	PTR	static-host.106-249-30-217.tatintel.com
217.30.249.156	PTR	static-host.156-249-30-217.tatintel.com
217.30.249.191	PTR	static-host.191-249-30-217.tatintel.com
217.30.249.192	PTR	static-host.192-249-30-217.tatintel.com
217.30.249.230	A+PTR	mail-default.ivfrt.com
217.30.249.234	PTR	static-host.234-249-30-217.tatintel.com
217.30.249.234	A	mx2.hms-kkm.ru
217.30.249.235	PTR	static-host.235-249-30-217.tatintel.com
217.30.249.235	A	hms-kkm.ru
217.30.250.100	PTR	static-host.100-250-30-217.tatintel.com
217.30.250.100	A	kazan-speedtest.corbina.net
217.30.251.30	PTR	static-host.30-251-30-217.tatintel.com
217.30.251.30	A	mail.tehnotron.biz
217.30.251.30	A	tehnotron.biz
217.30.251.85	A	lkurl.tatenergosbyt.ru
217.30.251.85	A	lkfl.tatenergosbyt.ru
217.30.251.86	A	www.tatenergosbyt.ru
217.30.251.93	A	maillk.tatenergosbyt.ru
217.30.251.102	A+PTR	mx1.tataesk.ru
217.30.251.103	A	mx2.tataesk.ru
217.30.251.106	A	lkurl.tatenergosbyt.ru
217.30.251.115	A+PTR	mail.iopc.ru
217.30.251.115	A	mail.iopc.knc.ru
217.30.251.134	A+PTR	msk.vipcons.com
217.30.251.134	A	mx02.skyland.su
217.30.252.254	A	freeside.kgts.ru
217.30.253.174	PTR	static-host.174-253-30-217.tatintel.com
217.30.253.174	A	edu.kgts.ru
217.30.253.178	A+PTR	mail.aksalut.ru
217.30.254.118	A	mail.kip-group.com
217.30.254.166	A+PTR	kazan.rostagroup.ru
217.30.254.166	A	mail.kazan.rostagroup.ru
217.30.255.74	A+PTR	mail3.skyseven.ru
217.30.255.106	A+PTR	mx.kamges.com
217.30.255.166	PTR	mail.komisgroup.ru
217.30.255.223	A	fasrt.kgts.ru