Robtex

Up: 212.1.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 212.1.0.0/20
Down right: 212.1.16.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.1.1.54	A	mail2.tmf-group.com
212.1.1.55	A+PTR	mail.tmf-group.com
212.1.1.55	A	tmf-brm-nlamv.net.infonet.nl
212.1.1.60	A+PTR	mail1.tmf-group.com
212.1.1.98	A+PTR	nep-vpn-replacement.net.infonet.nl
212.1.1.110	A+PTR	amstelveen-vpn-nl-necphilips.net.infonet.nl
212.1.2.41	A+PTR	esg.tmf-group.com
212.1.2.42	A+PTR	esg.tmf-group.com
212.1.2.100	A	kingswaytaitz.com.au
212.1.2.249	A	sync.tmf-group.com
212.1.7.18	PTR	www.aboutyou.nautadutilh.com
212.1.7.19	PTR	webmail.nautadutilh.com
212.1.7.20	PTR	webaccess.nautadutilh.com
212.1.7.33	PTR	mail.nautadutilh.com
212.1.7.36	PTR	www.employee.nautadutilh.com
212.1.7.37	PTR	dealroom.nautadutilh.com
212.1.7.82	PTR	antispam-1.nec-philips.com
212.1.8.2	A	bridget.hoogovens.com
212.1.8.18	A	ratingmodel.com
212.1.8.18	A	ratingtools.com
212.1.8.18	A	nibcapital.biz
212.1.8.84	PTR	dns1.ssmcoal.com.net.infonet.nl
212.1.8.85	A	dns2.ssmcoal.com.net.infonet.nl
212.1.8.89	A+PTR	oxb-wpf-01.cst.infonet.nl
212.1.8.89	A+PTR	oxb-wpf-01.net.infonet.nl
212.1.8.93	A	oxb-nlhlm-wcg-1.cst.infonet.nl
212.1.8.142	A	xs2.nibc.com
212.1.10.34	A	a.mx.yokogawa.it
212.1.11.45	A	ismc-ecole.com
212.1.12.10	A+PTR	avi-mro-gb-hertfordshire.net.infonet.nl
212.1.12.14	A+PTR	avi-mro-hk-kowloon.net.infonet.nl
212.1.12.18	A+PTR	avi-mro-us-atlanta.net.infonet.nl
212.1.12.22	A	sta-mro-nl-amersfoort.net.infonet.nl
212.1.12.38	PTR	tan-mro-nl-ede2.net.infonet.nl
212.1.12.42	PTR	tan-mro-de-lvk1.net.infonet.nl
212.1.12.138	PTR	tre-mro-us-nyc1.net.infonet.nl
212.1.12.146	A+PTR	tre-rof-cn-sha1.net.infonet.nl
212.1.12.178	A+PTR	tre-rof-fr-par1.net.infonet.nl
212.1.15.6	PTR	mail.sjouw.com
212.1.15.6	A	smtp.sjouw.com
212.1.15.6	A	sjouw.com
212.1.15.13	A	mail2.sjouw.com
212.1.15.50	A	vm.red13.nl
212.1.15.52	PTR	download.red13.nl
212.1.15.53	A	win7.red13.nl
212.1.15.59	A	mail.controlling-chaos.eu
212.1.15.59	A	ns0.controlling-chaos.eu
212.1.15.82	A	ilo-380.red13.nl
212.1.15.83	A	ilo-360.red13.nl
212.1.15.84	A+PTR	mail.red13.nl
212.1.15.84	A	red13.nl
212.1.15.234	A	mail.rec.raytheon.nl
212.1.15.234	A	rec.raytheon.nl
212.1.15.236	PTR	mail1.rucanor.com
212.1.15.238	A	vopak.org
212.1.16.66	PTR	mail.yokogawa.nl
212.1.16.67	PTR	mail2.yokogawa.nl
212.1.16.70	PTR	portal.yokogawa.nl
212.1.16.71	A+PTR	poort.yokogawa.nl
212.1.18.82	PTR	mail.trespa.nl
212.1.18.88	PTR	static.trespa.com
212.1.18.97	A+PTR	amsterdam1-nl-rb.net.infonet.nl
212.1.18.105	PTR	nlsr003bxmdz.storkgroup.com
212.1.20.5	PTR	mail.intertrustgroup.com
212.1.21.68	A+PTR	mail.desso.com
212.1.21.68	A	mail.dessosports.com
212.1.21.71	A	mail2.desso.com
212.1.21.85	A	email.caldic.nl
212.1.21.100	A	mail.r2group.eu
212.1.21.106	A+PTR	tanatex-3party-vpn.net.infonet.nl
212.1.21.114	A+PTR	mail.tanatexchemicals.com
212.1.21.114	A+PTR	tan-brm-nlamv.net.infonet.nl
212.1.21.140	A	ins-ivw-01.cst.infonet.nl
212.1.21.140	A	ins-ivw-01.net.infonet.nl
212.1.21.141	A	ins-www-01.net.infonet.nl
212.1.21.141	A	ins-www-01.cst.infonet.nl
212.1.21.201	A	ins-ivm-01.net.infonet.nl
212.1.21.201	A	ins-ivm-01.cst.infonet.nl
212.1.21.204	A	ins-ivc-01.net.infonet.nl
212.1.21.206	A	ins-ivp-01.net.infonet.nl
212.1.25.5	PTR	mail.trespa.com
212.1.25.5	A+PTR	tre-nlspl-web-02.cst.infonet.nl
212.1.25.6	A	meteon.eu
212.1.25.6	A	trespa.info
212.1.25.6	A	mail.meteon.eu
212.1.25.7	PTR	www.trespa.com
212.1.25.7	PTR	tre-nlspl-web-01.cst.infonet.nl
212.1.25.52	A	ord-nlspl-web-1.cst.infonet.nl
212.1.25.69	A	stibbeus.com
212.1.25.69	A	www.stibbe.be
212.1.25.69	A	stibbe.co.uk
212.1.25.130	PTR	portal.infonet.nl
212.1.25.133	A	sip.infonet.nl
212.1.25.134	A+PTR	conf.infonet.nl
212.1.25.142	A	www.kpncareportal.com
212.1.25.228	A+PTR	ftp01.mammoet.com
212.1.25.246	A	webmail.mammoet.com
212.1.26.8	A	kpco.nl
212.1.28.4	PTR	mail.barentz.nl
212.1.31.28	PTR	teurseexh.thermon-europe.com