Robtex

Up: 87.255.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 87.255.16.0/22
Down right: 87.255.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
87.255.16.0	PTR	net-87-255-16.bigtelecom.ru
87.255.16.14	A	host-87-255-16-14.bigtelecom.ru
87.255.16.15	A	host-87-255-16-15.bigtelecom.ru
87.255.16.22	A	host-87-255-16-22.bigtelecom.ru
87.255.16.122	A	host-87-255-16-122.bigtelecom.ru
87.255.16.147	A	host-87-255-16-147.bigtelecom.ru
87.255.16.229	A	host-87-255-16-229.bigtelecom.ru
87.255.17.5	A	host-87-255-17-5.bigtelecom.ru
87.255.17.25	A	host-87-255-17-25.bigtelecom.ru
87.255.17.55	A	host-87-255-17-55.bigtelecom.ru
87.255.17.161	A	host-87-255-17-161.bigtelecom.ru
87.255.17.176	A	host-87-255-17-176.bigtelecom.ru
87.255.17.232	A	host-87-255-17-232.bigtelecom.ru
87.255.18.6	A	sofiadoors.info
87.255.18.7	A	mx.sofiadoors.com
87.255.18.18	A+PTR	mail2.tomail.ru
87.255.18.18	A	tomail.ru
87.255.18.36	A	host-87-255-18-36.bigtelecom.ru
87.255.18.36	A	himki-hor.ru
87.255.18.38	A	www.himki-edu.ru
87.255.18.71	A	mostrk.ru
87.255.18.74	A+PTR	host-87-255-18-74.bigtelecom.ru
87.255.18.74	A	nsd152.ru
87.255.18.74	A	rec-all.ru
87.255.18.101	A	olmer.su
87.255.18.101	A	uo3.ru
87.255.18.101	A	uolm.ru
87.255.18.154	A	mxmain.tigercraft.ru
87.255.18.169	A+PTR	host-87-255-18-169.bigtelecom.ru
87.255.18.169	A	helda.me
87.255.18.169	A	mail.helda.me
87.255.18.171	A	host-87-255-18-171.bigtelecom.ru
87.255.18.188	A	host-87-255-18-188.bigtelecom.ru
87.255.18.189	A	lmsportal.ru
87.255.18.195	PTR	host-87-255-18-195.bigtelecom.ru
87.255.18.195	A	jbobrov.ru
87.255.18.201	A+PTR	host-87-255-18-201.bigtelecom.ru
87.255.18.201	A	www.skysoft.ru
87.255.18.201	A	mail-server.skysoft.ru
87.255.18.209	A	mail.fraguniverse.ru
87.255.18.209	A	fraguniverse.ru
87.255.18.221	A	host-87-255-18-221.bigtelecom.ru
87.255.18.225	A+PTR	host-87-255-18-225.bigtelecom.ru
87.255.18.228	A	puhov.name
87.255.18.228	A	host-87-255-18-228.bigtelecom.ru
87.255.18.228	A	alekseevanata.com
87.255.18.247	A	host-87-255-18-247.bigtelecom.ru
87.255.19.1	A	host-87-255-19-1.bigtelecom.ru
87.255.19.20	A	host-87-255-19-20.bigtelecom.ru
87.255.19.28	A	mtechnic.ru
87.255.19.28	A	mail.m1kael.ru
87.255.19.28	A	mail.rem772.ru
87.255.19.71	A	angrybear.ru
87.255.19.71	A	host-87-255-19-71.bigtelecom.ru
87.255.19.79	A	rarek.ru
87.255.19.98	A+PTR	host-87-255-19-98.bigtelecom.ru
87.255.19.98	A	bevbs.com
87.255.19.98	A	mail.bevbs.com
87.255.19.103	A	host-87-255-19-103.bigtelecom.ru
87.255.19.104	A+PTR	host-87-255-19-104.bigtelecom.ru
87.255.19.113	PTR	host-87-255-19-113.bigtelecom.ru
87.255.19.113	A	shara.cf
87.255.19.133	A	wd-game.com
87.255.19.133	A	xn----8sbwb8ajo2aao.com
87.255.19.133	A	betris.ru
87.255.19.154	A+PTR	host-87-255-19-154.bigtelecom.ru
87.255.19.157	A	fatey.ru
87.255.19.157	A	gate.fatey.ru
87.255.19.206	A	host-87-255-19-206.bigtelecom.ru
87.255.19.230	A	mso-mail.katren.ru
87.255.19.237	A	mail.admhimki.ru
87.255.20.65	A	host-87-255-20-65.bigtelecom.ru
87.255.20.109	A	host-87-255-20-109.bigtelecom.ru
87.255.20.145	A	host-87-255-20-145.bigtelecom.ru
87.255.20.178	A	host-87-255-20-178.bigtelecom.ru
87.255.20.211	A	host-87-255-20-211.bigtelecom.ru
87.255.21.4	A	www.semargl.ru
87.255.21.4	A	webmail.semargl.ru
87.255.21.5	A	ts-a.ru
87.255.21.5	A	ns.ts-a.ru
87.255.21.22	A	ns2.centralsound.ru
87.255.21.22	A	red.knvr.ru
87.255.21.22	A	post.knvr.ru
87.255.21.23	A	islay.knvr.ru
87.255.21.24	PTR	mail.mactips.ru
87.255.21.24	A	knvr.ru
87.255.21.38	A	4e6a.ru
87.255.21.60	A	host-87-255-21-60.bigtelecom.ru
87.255.21.74	PTR	platbox.ru
87.255.21.122	A+PTR	mail.rusokon.ru
87.255.21.150	A	gate.gcorp.ru
87.255.21.152	A+PTR	host-87-255-21-152.bigtelecom.ru
87.255.21.154	PTR	host-87-255-21-154.bigtelecom.ru
87.255.21.156	A	host-87-255-21-156.bigtelecom.ru
87.255.21.156	A	mail.gloriacompany.ru
87.255.21.203	PTR	host-87-255-21-203.bigtelecom.ru
87.255.21.203	A	kubriks.ru
87.255.21.203	A	ns1.rdws.ru
87.255.21.209	A+PTR	host-87-255-21-209.bigtelecom.ru
87.255.21.209	A	ns0.arlc.ru
87.255.21.209	A	ns0.chroot.ru
87.255.22.9	A	host-87-255-22-9.bigtelecom.ru
87.255.22.162	A	host-87-255-22-162.bigtelecom.ru
87.255.22.215	A	host-87-255-22-215.bigtelecom.ru
87.255.22.220	A	host-87-255-22-220.bigtelecom.ru
87.255.23.32	A+PTR	host-87-255-23-32.bigtelecom.ru
87.255.23.72	A	host-87-255-23-72.bigtelecom.ru
87.255.23.197	A	host-87-255-23-197.bigtelecom.ru
87.255.23.236	A	ns.tomasetto.ru
87.255.23.236	A	ns1.rezis.ru
87.255.23.236	A	ns1.elib.ru