Robtex

Up: 216.104.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 216.104.0.0/20
Down right: 216.104.16.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.104.0.1	PTR	in01.iad.mx.trendmicro.com
216.104.0.1	A	trendmicro.pegaso.com.mx
216.104.0.2	PTR	in02.iad.mx.trendmicro.com
216.104.0.3	A+PTR	in03.iad.mx.trendmicro.com
216.104.4.2	PTR	relay01.iad.mx.trendmicro.com
216.104.4.29	A	mx-out02.iad.mail-abuse.org
216.104.4.30	A	out03.iad.mx.trendmicro.com
216.104.4.30	A	mx-out03.iad.mail-abuse.org
216.104.4.32	PTR	tk-cc1.iad.mail-abuse.org
216.104.4.32	A	ess-va.trendmicro.com
216.104.4.34	A	tk-cs1.iad.mail-abuse.org
216.104.4.35	A+PTR	tk-cs2.iad.mail-abuse.org
216.104.4.56	A	ns3.sdi.trendmicro.com
216.104.4.65	A	east-pub3.mail-abuse.org
216.104.13.1	A+PTR	mel11.securecloud.com
216.104.13.1	PTR	xsp.in.us02.emsp.trendmicro.com
216.104.13.1	PTR	prefilter.in.us04.emsp.trendmicro.com
216.104.13.6	A	out.pair01.imht.udc2.mx.trendmicro.com
216.104.13.72	PTR	udc2-wtp-g5-mmc2.sdi.trendnet.org
216.104.19.25	A	cluster-mx01.trendmicro-europe.com
216.104.20.9	PTR	imhs.trendmicro.eu
216.104.20.11	A	safesync.de
216.104.20.11	A	securityopinions.com
216.104.20.11	A	simplysecurity.com
216.104.20.13	A	www.trendmicroupdate.com
216.104.20.24	A	securityopinions.com
216.104.20.37	A+PTR	conserv1.muc.mx.trendmicro.com
216.104.20.42	A	identum02.mx.trendmicro.eu
216.104.20.43	A	identum03.mx.trendmicro.eu
216.104.20.49	A	edc2vmout05.edc.trendmicro.com
216.104.20.96	A	edc2-itpf-01.edc.trendmicro.com
216.104.20.120	A	notificationeu.trendmicro.com
216.104.20.121	A	nsadmineu1.notification.trendmicro.com
216.104.20.124	A	rissp.com
216.104.20.132	A	edc2-itpf-02.edc.trendmicro.com
216.104.20.133	A	edc2-itpf-03.edc.trendmicro.com
216.104.20.134	A	edc2-itpf-04.edc.trendmicro.com
216.104.20.158	A	edc2-tmns01.trendidc.net
216.104.20.161	A	frweb01.trendmicro.fr
216.104.20.177	PTR	www.trendmicro.fr
216.104.20.180	A+PTR	monit.mx.trendmicro.eu
216.104.20.189	A	www.antivirus.de
216.104.20.189	A	pl.trendmicro-europe.com
216.104.20.200	A+PTR	edc2vmmail02.edc.trendmicro.com
216.104.20.200	A+PTR	edcmail03.edc.trendmicro.com
216.104.20.200	A	edcmail01.edc.trendmicro.com
216.104.20.202	PTR	edc2vmextmail01.edc.trendmicro.com
216.104.20.202	A	mail.wolli-weiss-was.com
216.104.24.48	A	www.trendmicroaffinity.com
216.104.24.100	A	tmns4.trendmicro.com
216.104.27.17	PTR	imhs.trendmicro.eu
216.104.29.35	A+PTR	orpheus.av-emea.com
216.104.29.35	A	www.av-emea.net
216.104.29.36	A+PTR	hugo.tmlab.de
216.104.29.36	A+PTR	mail.tmlab.de