Robtex

Up: 212.34.56.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 212.34.60.0/23
Down right: 212.34.62.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.34.60.5	A+PTR	mail.kurortproject.ru
212.34.60.59	PTR	mail-moscow.polaru.com
212.34.60.100	A	mx.mosgorenergo.ru
212.34.60.114	PTR	mail.cito-pro.ru
212.34.60.114	A	mx0.cito-pro.ru
212.34.60.114	A	cito-pro.ru
212.34.60.138	PTR	mail.cosmetika.ru
212.34.60.140	PTR	mail.cosmetika.ru
212.34.60.218	A	img-engineering.ru
212.34.60.230	A+PTR	mx.sonet.ru
212.34.60.233	PTR	mx.sonet.ru
212.34.61.10	PTR	turbophone.cifra1.ru
212.34.61.30	PTR	mail.iss-atom.ru
212.34.61.114	PTR	mx1.valentapharm.com
212.34.61.116	PTR	mx2.valentapharm.com
212.34.61.147	A	mail37.leader-invest.ru
212.34.61.162	PTR	mail.adp.ru
212.34.61.190	A+PTR	proxy.diod.ru
212.34.61.190	A	diod.ru
212.34.61.218	A	7884474.ru
212.34.61.220	PTR	relay.mdm-group.ru
212.34.61.220	A	relay2.mdm-group.ru
212.34.61.242	A	glio.ru
212.34.63.3	PTR	3-leased-lines-net-34-63-sitek.net
212.34.63.7	PTR	7-leased-lines-net-34-63-sitek.net
212.34.63.7	A	mkbup.ru
212.34.63.9	A+PTR	mail.mkb-kompas.ru
212.34.63.17	PTR	17-leased-lines-net-34-63-sitek.net
212.34.63.17	A	www.mkb-kompas.ru
212.34.63.17	A	mkb-kompas.ru
212.34.63.34	PTR	34-leased-lines-net-34-63-sitek.net
212.34.63.53	A+PTR	server.martineden.ru
212.34.63.53	A	mail.martineden.ru
212.34.63.67	PTR	mail.nexo.ru
212.34.63.67	A	mail.avtoconnex.com
212.34.63.67	A	mail.avtoconnex.ru
212.34.63.72	PTR	mail.ciam.ru
212.34.63.104	PTR	webhost.trd.ru
212.34.63.116	PTR	video-box.ru
212.34.63.154	A	almagroup.today
212.34.63.210	A+PTR	mail-server.sogaz-med.ru
212.34.63.216	PTR	216-leased-lines-net-34-63-sitek.net
212.34.63.242	PTR	242-leased-lines-net-34-63-sitek.net
212.34.63.255	PTR	255-leased-lines-net-34-63-sitek.net