Robtex

Up: 213.157.16.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 213.157.16.0/25
Down right: 213.157.16.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.157.16.1	PTR	esr.dns-dwg.de
213.157.16.2	A	database.wavelearn.de
213.157.16.3	PTR	provider.wavelearn.de
213.157.16.3	A	10130138.wavelearn.de
213.157.16.3	A	www.dns-dwg.de
213.157.16.9	PTR	esr.dns-dwg.de
213.157.16.10	A	vpn.dns-dwg.de
213.157.16.15	PTR	bcn03.dns-dwg.de
213.157.16.17	A	mail03.dns-dwg.de
213.157.16.19	A+PTR	ns1.dwg-sys.de
213.157.16.19	A	ns1.dns-dwg.de
213.157.16.21	PTR	web.dwg-sys.de
213.157.16.21	A	web.dns-dwg.de
213.157.16.22	A+PTR	mail05.dwg-sys.de
213.157.16.25	A+PTR	mail02.dwg-sys.de
213.157.16.25	A	mail.dns-dwg.de
213.157.16.25	A	mail02.dns-dwg.de
213.157.16.26	A+PTR	mail01.dwg-sys.de
213.157.16.26	A	mail.dns-dwg.de
213.157.16.26	A	mail.dwg-sys.de
213.157.16.29	A	isr.dns-dwg.de
213.157.16.30	A+PTR	esr.dns-dwg.de
213.157.16.31	A	www.wavelearn.com
213.157.16.33	PTR	esr.dns-dwg.de
213.157.16.34	PTR	www.wavelearn.de
213.157.16.34	A	avb-campus.de
213.157.16.34	A	wavelearn.at
213.157.16.35	A+PTR	webmail.wavelearn.de
213.157.16.37	A	wb-university--oc.com
213.157.16.37	A	wb-university-oc.com
213.157.16.37	A	wb-online-campus.eu
213.157.16.38	PTR	studiengemda.heagmedianet.de
213.157.16.38	A	www.wb-online-campus.de
213.157.16.38	A	www.oc-privatfh-da.de
213.157.16.40	A	www.apollon-campus.de
213.157.16.65	PTR	esr.dns-dwg.de
213.157.16.66	PTR	fcs.privatfh-da.de
213.157.16.66	A	10147866.wavelearn.com
213.157.16.66	A	*.wavelearn.com
213.157.16.69	PTR	esr.dns-dwg.de
213.157.16.73	PTR	esr.dns-dwg.de
213.157.16.77	A	mail02.diginet.de
213.157.16.80	PTR	marfucci.hse-medianet.de
213.157.16.82	A	smtp.signal7.de
213.157.16.104	PTR	wibas.hse-medianet.de
213.157.16.104	A	mail.wibas.de
213.157.16.105	A	svn.wibas.de
213.157.16.108	PTR	wibas.hse-medianet.de
213.157.16.120	PTR	level6.heagmedianet.de
213.157.16.133	PTR	ecos-office-center.hse-medianet.de
213.157.16.133	A	wmx.karisweb.de
213.157.16.160	PTR	adra.heagmedianet.de
213.157.16.161	PTR	adra.heagmedianet.de
213.157.16.162	PTR	webmail.adra.de
213.157.16.163	PTR	adra.heagmedianet.de
213.157.16.164	PTR	adra.heagmedianet.de
213.157.16.165	PTR	adra.heagmedianet.de
213.157.16.166	PTR	adra.heagmedianet.de
213.157.16.167	PTR	adra.heagmedianet.de
213.157.16.168	PTR	adra.heagmedianet.de
213.157.16.169	PTR	adra.heagmedianet.de
213.157.16.170	PTR	adra.heagmedianet.de
213.157.16.171	PTR	adra.heagmedianet.de
213.157.16.172	PTR	adra.heagmedianet.de
213.157.16.173	PTR	adra.heagmedianet.de
213.157.16.174	PTR	adra.heagmedianet.de
213.157.16.175	PTR	adra.heagmedianet.de
213.157.16.186	A	mail2.dfs-as.aero
213.157.16.195	A	oni-manage.subsequent.de
213.157.16.218	A	prelisten01.subsequent.de
213.157.16.219	A	notafina.de
213.157.16.227	A	mailcleaner.electronic-minds.de
213.157.16.233	A+PTR	elecminds.heagmedianet.de
213.157.16.233	A	router.minds.de
213.157.16.237	PTR	elecminds.heagmedianet.de
213.157.16.237	A	mail.electronic-minds.de
213.157.16.240	PTR	infoplus.heagmedianet.de