Robtex

Up: 217.66.64.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 217.66.64.0/21
Down right: 217.66.72.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.66.64.4	A+PTR	nmts.smrtlc.ru
217.66.64.4	A	mail.smrtlc.ru
217.66.64.5	A	www.centrvolga.ru
217.66.64.7	A	stmvts.smrtlc.ru
217.66.64.34	PTR	cvxr-pe-r-sad.smrtlc.ru
217.66.64.68	A+PTR	hosting.mystep.ru
217.66.64.68	A	mystep.ru
217.66.64.68	A	samaratelecom.ru
217.66.64.94	A	mail.aquapark-samara.ru
217.66.64.94	A	kosmoport.mega-samara.ru
217.66.64.94	A	moskovsky.mega-samara.ru
217.66.64.133	A+PTR	flows.smrtlc.ru
217.66.66.3	A+PTR	mail.mystep.ru
217.66.66.3	A	bluebirdre.com
217.66.66.4	A+PTR	mail.samaratelecom.ru
217.66.66.5	A+PTR	sunny.smrtlc.ru
217.66.66.128	A	dial70-line1.smrtlc.ru
217.66.66.135	PTR	st-zagora-r1.smrtlc.ru
217.66.66.135	A	dial70-line8.smrtlc.ru
217.66.66.136	PTR	ph-smr-r1.smrtlc.ru
217.66.66.136	A	dial70-line9.smrtlc.ru
217.66.66.137	A	dial70-line10.smrtlc.ru
217.66.68.4	PTR	mail.samplast.ru
217.66.68.66	A+PTR	mail.primeshipping.ru
217.66.70.0	PTR	net70.smrtlc.net
217.66.70.130	PTR	tehgeobur.ru
217.66.71.98	A+PTR	mail.net70.ru
217.66.71.155	PTR	rev.sformat.ru
217.66.71.210	PTR	mail.vdcom.ru
217.66.72.26	A	mail2.sgtp.samara.ru
217.66.72.129	PTR	mail.gss.ru
217.66.72.147	A+PTR	s-gidromash.ru
217.66.72.202	A+PTR	ns.eor.samara.ru
217.66.72.203	A+PTR	ex.eor.samara.ru
217.66.72.242	A	mailserver.solid.ru
217.66.72.244	PTR	www.solid.ru
217.66.72.247	PTR	mx1.solid.ru
217.66.72.247	A	mx1.solidarnost.ru
217.66.73.90	A	smrtlc.ru
217.66.73.114	A+PTR	sr.smrtlc.ru
217.66.73.114	A	smrtlc.ru
217.66.73.114	A	ms.sr.smrtlc.ru
217.66.73.122	PTR	telephone.ru.net70.ru
217.66.73.130	PTR	mail.inversia.ru
217.66.73.190	A	ns.sw.smrtlc.ru
217.66.73.194	A	ns.sdc.smrtlc.ru
217.66.74.52	A	mail.pechat63.ru
217.66.74.56	PTR	mx.tsk-samara.ru
217.66.75.244	A+PTR	exchange.companion-group.ru
217.66.76.0	PTR	net76.smrtlc.net
217.66.76.162	A+PTR	mail.giprovostokneft.ru
217.66.76.162	A	mail.gipvn.ru
217.66.76.162	A	ns.giprovostokneft.ru
217.66.79.0	PTR	net79.smrtlc.net
217.66.79.10	PTR	mx.parkhouse2.ru
217.66.79.26	PTR	fss.samtel.ru
217.66.79.26	A	mail1.fss.samtel.ru
217.66.79.115	A+PTR	mail.ccmvolga.ru
217.66.79.115	A	ccmvolga.ru