Robtex

Up: 37.0.86.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 37.0.87.0/25
Down right: 37.0.87.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
37.0.87.0	PTR	rt87bb0-37-0.routit.net
37.0.87.2	PTR	rt87bb0-37-2.routit.net
37.0.87.3	PTR	rt87bb0-37-3.routit.net
37.0.87.3	A	s1-eu5.startpage.com
37.0.87.4	PTR	rt87bb0-37-4.routit.net
37.0.87.4	A	www.ixquick.de
37.0.87.6	PTR	rt87bb0-37-6.routit.net
37.0.87.6	A	ixquick.nl
37.0.87.7	PTR	rt87bb0-37-7.routit.net
37.0.87.7	A	s2-eu5.startpage.com
37.0.87.7	A	eu3.startpage.com
37.0.87.8	PTR	rt87bb0-37-8.routit.net
37.0.87.9	PTR	rt87bb0-37-9.routit.net
37.0.87.9	A	eu.ixquick-proxy.com
37.0.87.12	PTR	rt87bb0-37-12.routit.net
37.0.87.12	A	s3-eu5.ixquick-proxy.com
37.0.87.15	PTR	rt87bb0-37-15.routit.net
37.0.87.15	A	classic.startpage.com
37.0.87.15	A	s4-eu5.startpage.com
37.0.87.16	PTR	rt87bb0-37-16.routit.net
37.0.87.16	A	ixquick-proxy.com
37.0.87.19	PTR	rt87bb0-37-19.routit.net
37.0.87.19	A	s5-eu5.startpage.com
37.0.87.20	PTR	rt87bb0-37-20.routit.net
37.0.87.21	PTR	rt87bb0-37-21.routit.net
37.0.87.23	PTR	rt87bb0-37-23.routit.net
37.0.87.23	A	s6-eu5.startpage.com
37.0.87.23	A	startpage.com
37.0.87.24	PTR	rt87bb0-37-24.routit.net
37.0.87.24	A	ixquick-proxy.com
37.0.87.27	PTR	rt87bb0-37-27.routit.net
37.0.87.27	A	s7-eu5.startpage.com
37.0.87.28	PTR	rt87bb0-37-28.routit.net
37.0.87.31	PTR	rt87bb0-37-31.routit.net
37.0.87.31	A	eu5.startpage.com
37.0.87.31	A	s8-eu5.startpage.com
37.0.87.32	PTR	rt87bb0-37-32.routit.net
37.0.87.34	PTR	rt87bb0-37-34.routit.net
37.0.87.35	PTR	rt87bb0-37-35.routit.net
37.0.87.35	A	s9-eu5.startpage.com
37.0.87.38	PTR	rt87bb0-37-38.routit.net
37.0.87.39	PTR	rt87bb0-37-39.routit.net
37.0.87.39	A	s10-eu5.startpage.com
37.0.87.40	PTR	rt87bb0-37-40.routit.net
37.0.87.40	A	ixquick-proxy.com
37.0.87.42	PTR	rt87bb0-37-42.routit.net
37.0.87.43	PTR	rt87bb0-37-43.routit.net
37.0.87.43	A	s11-eu5.startpage.com
37.0.87.47	PTR	rt87bb0-37-47.routit.net
37.0.87.47	A	s12-eu5.startpage.com
37.0.87.48	PTR	rt87bb0-37-48.routit.net
37.0.87.51	PTR	rt87bb0-37-51.routit.net
37.0.87.51	A	s13-eu5.startpage.com
37.0.87.52	PTR	rt87bb0-37-52.routit.net
37.0.87.53	PTR	rt87bb0-37-53.routit.net
37.0.87.54	PTR	rt87bb0-37-54.routit.net
37.0.87.54	A	s3-eu5.ixquick-proxy.com
37.0.87.55	PTR	rt87bb0-37-55.routit.net
37.0.87.55	A	s14-eu5.startpage.com
37.0.87.59	A	www.datenschutztag.org
37.0.87.62	A	datenschutztag.org
37.0.87.69	PTR	rt87bb0-37-69.routit.net
37.0.87.69	A	nivlek.no-ip.org
37.0.87.69	A	ns2.nivlek.nl
37.0.87.70	PTR	rt87bb0-37-70.routit.net
37.0.87.70	A	life-events.nl
37.0.87.70	A	*.esrocom.nl
37.0.87.76	A	mail.pl-online.net
37.0.87.83	A	mx1.scatox.nl
37.0.87.92	PTR	rt87bb0-37-92.routit.net
37.0.87.92	A	mail.brandsma.com
37.0.87.93	PTR	rt87bb0-37-93.routit.net
37.0.87.93	A	utmcluster.esrocom.nl
37.0.87.100	PTR	rt87bb0-37-100.routit.net
37.0.87.100	A	mail.crowehorwath.nl
37.0.87.103	PTR	rt87bb0-37-103.routit.net
37.0.87.113	PTR	rt87bb0-37-113.routit.net
37.0.87.134	A	mail.whw.nl
37.0.87.138	A	insulconmail.com
37.0.87.139	A	insulconwebshop.com
37.0.87.140	PTR	rt87bb0-37-140.routit.net
37.0.87.140	A	filecap.insulcon.com
37.0.87.154	A	mail2.duran-audio.com
37.0.87.186	A	mail1.cda.nl
37.0.87.202	PTR	rt87bb0-37-202.routit.net
37.0.87.211	A	huismus.nl
37.0.87.212	A	extranet.vogelbescherming.nl
37.0.87.213	A	smtp.vogelbescherming.nl
37.0.87.242	PTR	rt87bb0-37-242.routit.net
37.0.87.242	A	mail.dreumex.com