Robtex

Up: 81.80.236.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.80.237.0/25
Down right: 81.80.237.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.80.237.5	A+PTR	secure.sdv.com
81.80.237.10	A+PTR	smtp-out.dti.bollore.com
81.80.237.10	A	netgate-bollore.dti.bollore.com
81.80.237.11	A+PTR	lfwns002.fr.dti.bollore.com
81.80.237.13	A	mail.camrail.net
81.80.237.17	A	i1fnamgt02.sl.dti.bollore.com
81.80.237.21	A	i1phcmgt01.ng.dti.bollore.com
81.80.237.22	PTR	mail.cm.dti.bollore.com
81.80.237.26	PTR	smtp1.dti.bollore.com
81.80.237.26	A	mail.espritinfo.fr
81.80.237.26	A	mail.espritinfo.org
81.80.237.27	PTR	smtp2.dti.bollore.com
81.80.237.27	A	mail2.espritinfo.net
81.80.237.27	A	mail2.espritinfo.eu
81.80.237.28	A+PTR	i1ladmgt01.ao.dti.bollore.com
81.80.237.29	A+PTR	i1lbvmgt01.ga.dti.bollore.com
81.80.237.32	A+PTR	i1lfwmgt01.tg.dti.bollore.com
81.80.237.34	A+PTR	i1temmes01.gh.dti.bollore.com
81.80.237.35	A+PTR	i1ditmgt01.ditcameroun.com
81.80.237.69	A	mail.cm.dti.bollore.com
81.80.237.74	A	i1bewmgt01.mz.dti.bollore.com
81.80.237.125	A	someport-walon.fr
81.80.237.125	A	someport-walon.com
81.80.237.133	A	mail.photo-suez-env.com
81.80.237.135	PTR	mail.suez-env.com
81.80.237.136	A	ondeo.com
81.80.237.142	PTR	mail2.suez-env.com
81.80.237.145	A	webmail.sdv.com
81.80.237.146	A	webmail.sagactl.com
81.80.237.149	A	webmail.sogetra.fr
81.80.237.150	A	secure.sagactl.com
81.80.237.161	A	akwaba.bollore.com
81.80.237.240	A+PTR	gw-81.c-si.fr
81.80.237.243	PTR	bck-sw3.c-si.fr