Robtex

Up: 212.1.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 212.1.16.0/21
Down right: 212.1.24.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
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
212.1.21.115	A+PTR	mail-out.tanatexchemicals.com
212.1.21.119	A+PTR	tan-nlspl-prx-1.cst.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
212.1.21.208	A+PTR	ins-ivp-03.cst.infonet.nl
212.1.21.208	A+PTR	ins-ivp-03.net.infonet.nl
212.1.21.209	A	ins-ivp-04.cst.infonet.nl
212.1.21.209	A	ins-ivp-04.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