Robtex

Up: 92.255.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 92.255.16.0/22
Down right: 92.255.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
92.255.16.0	PTR	ip-0.16.255.92.net.unnet.ru
92.255.16.84	A	espressio.ru
92.255.17.154	A+PTR	mail.master-class.spb.ru
92.255.17.170	A+PTR	mail.pandent.ru
92.255.17.170	A	ns2.pandent.ru
92.255.18.2	PTR	mediest.spb.ru
92.255.18.10	PTR	ip-10.18.255.92.net.unnet.ru
92.255.18.53	A	mx2.element-beton.ru
92.255.18.57	PTR	ip-57.18.255.92.net.unnet.ru
92.255.18.98	A+PTR	mail.patentica.com
92.255.18.98	A	smtp.patentica.com
92.255.18.99	A+PTR	smtp-in.patentica.com
92.255.18.105	PTR	ip-105.18.255.92.net.unnet.ru
92.255.18.155	PTR	ip-155.18.255.92.net.unnet.ru
92.255.18.171	A	mail.plan-travel.ru
92.255.18.178	PTR	ip-178.18.255.92.net.unnet.ru
92.255.18.186	A+PTR	mx.spb.k-to.ru
92.255.18.186	A	ns2.topskidka.ru
92.255.18.210	PTR	ip-210.18.255.92.net.unnet.ru
92.255.18.211	PTR	ip-211.18.255.92.net.unnet.ru
92.255.18.211	A	mx.jettechnologies.ru
92.255.18.212	A	mx1.jettechnologies.ru
92.255.18.212	A	mx0.jettechnologies.ru
92.255.18.240	PTR	ip-240.18.255.92.net.unnet.ru
92.255.18.241	PTR	ip-241.18.255.92.net.unnet.ru
92.255.19.2	A	ns.rustelecom-museum.ru
92.255.19.2	A	mail2.rustelecom-museum.ru
92.255.19.4	A	mail.rustelecom-museum.ru
92.255.19.255	PTR	ip-255.19.255.92.net.unnet.ru
92.255.21.7	PTR	sip.enf.it-d.it
92.255.21.9	A	ns5.itd.center
92.255.21.66	PTR	rikom.spb.ru
92.255.21.66	A	3364245.ru
92.255.21.66	A	xn----8sbc0aalcivf0abbi4m.xn--p1ai
92.255.21.120	PTR	ip-120.21.255.92.net.unnet.ru
92.255.21.120	A	itd.center
92.255.21.120	A	spo-holding.ru
92.255.21.121	PTR	ip-121.21.255.92.net.unnet.ru
92.255.21.121	A	emaspb.ru
92.255.21.121	A	xn--j1adm5c.xn--p1ai
92.255.21.130	A+PTR	mail.ecosafety.ru
92.255.21.131	A	www.ecosafety.ru
92.255.21.131	A	medsafe.doctor
92.255.21.131	A	ecosafety.ru
92.255.22.10	PTR	ip-10.22.255.92.net.unnet.ru
92.255.22.59	PTR	ip-59.22.255.92.net.unnet.ru
92.255.22.126	A	ns2.toneup.ru
92.255.22.126	A	ns2.itdone.ru
92.255.22.126	A	ns2.visitilmen.ru
92.255.22.190	A	mail.grad-invest.ru
92.255.22.212	A	nwcs.ru
92.255.22.212	A	mail.nwcs.ru
92.255.22.242	PTR	ip-242.22.255.92.net.unnet.ru
92.255.23.0	PTR	ip-0.23.255.92.net.unnet.ru
92.255.23.66	PTR	mail.vesty.spb.ru
92.255.23.75	A	ns2.ascon.ru
92.255.23.139	PTR	ip-139.23.255.92.net.unnet.ru
92.255.23.139	A	szgp.spb.ru
92.255.23.168	PTR	ip-168.23.255.92.net.unnet.ru
92.255.23.203	PTR	ip-203.23.255.92.net.unnet.ru