Robtex

Up: 213.170.120.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 213.170.124.0/23
Down right: 213.170.126.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.170.124.21	PTR	kq-audit-gw.124.quantum.ru
213.170.124.78	A+PTR	pfk.quantum.ru
213.170.124.94	PTR	relay.e-grp.ru
213.170.124.114	A	mail.vector-kaluga.ru
213.170.124.130	PTR	klg.microtech.ru
213.170.124.158	A+PTR	mail.palmi.ru
213.170.124.158	A	klg1w2kmail.palmi.ru
213.170.124.158	A	klg1mail.palmi.ru
213.170.124.210	PTR	mx.kzta.ru
213.170.124.212	PTR	mail.kzta.ru
213.170.124.240	PTR	mx.kzta.ru
213.170.124.254	PTR	relay.kalyga.ru
213.170.124.254	PTR	bender.kaluga.quantum.ru
213.170.124.254	PTR	mrtg.kaluga.quantum.ru
213.170.125.66	PTR	kq-dvs.quantum.ru
213.170.125.82	PTR	kq-trel.quantum.ru
213.170.125.82	A	sw-vector.ru
213.170.125.134	PTR	kq-renesm304.125.quantum.ru
213.170.125.230	PTR	kq-volkot.125.quantum.ru
213.170.125.242	A+PTR	mail.verz.info
213.170.125.246	PTR	mail.prodomarket.ru
213.170.126.18	A+PTR	relay.bong.ru
213.170.126.138	PTR	mx.kalugaoblvodokanal.ru
213.170.126.146	PTR	mail.te-kto.ru
213.170.126.202	A+PTR	mail.bakservis.ru
213.170.126.238	PTR	jukka-kaluga.ru
213.170.127.0	PTR	subnet0x8.127.quantum.ru
213.170.127.31	PTR	bcast24x8.127.quantum.ru
213.170.127.32	PTR	subnet32x8.127.quantum.ru
213.170.127.87	PTR	bcast84x4.127.quantum.ru
213.170.127.174	A+PTR	ns.kaluga.moyareklama.ru
213.170.127.174	A	mx.kaluga.moyareklama.ru
213.170.127.190	PTR	mail.krpms.ru
213.170.127.202	A	jukka-kaluga.ru
213.170.127.209	A	sv-smtp-02.vtsft.ru