Robtex

Up: 80.254.138.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 80.254.138.0/25
Down right: 80.254.138.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
80.254.138.1	A	dns.x.ray.net
80.254.138.1	A	next7.pl
80.254.138.1	A	mail.x.ray.net
80.254.138.27	A	mail.owus-bayern.org
80.254.138.27	A	owus-bayern.de
80.254.138.27	A	mail.owus-bayern.de
80.254.138.29	A	xn--korneliamller-qmb.de
80.254.138.64	PTR	not.assigned.by.all-connect.net
80.254.138.68	A+PTR	kassel.all-connect.net
80.254.138.92	PTR	not.assigned.by.all-connect.net
80.254.138.116	PTR	not.assigned.by.all-connect.net
80.254.138.119	PTR	not.assigned.by.all-connect.net
80.254.138.121	PTR	not.assigned.by.all-connect.net
80.254.138.129	A	relay.mail-connect.net
80.254.138.129	A	postausgang.mail-connect.net
80.254.138.130	A	relay.mail-connect.net
80.254.138.130	A	postausgang.mail-connect.net
80.254.138.131	A+PTR	relay03.mail-connect.net
80.254.138.131	A	smtp-relay.multiphone.de
80.254.138.137	A+PTR	mx01.mail-connect.net
80.254.138.137	A	mxac.datamints.com
80.254.138.137	A	mx.mail-connect.net
80.254.138.138	A+PTR	mx02.mail-connect.net
80.254.138.138	A	mxac.datamints.com
80.254.138.138	A	mx.mail-connect.net
80.254.138.140	PTR	mua01.mail-connect.net
80.254.138.140	A	mail.conergy.us
80.254.138.140	A	pop.key-4-you.de
80.254.138.151	PTR	www.mail-connect.de
80.254.138.151	A	webmail.mail-connect.net
80.254.138.151	A	www.mail-connect.net
80.254.138.158	A	zimbra01.mail-connect.net
80.254.138.163	PTR	koeln
80.254.138.165	A+PTR	talk-demo01.mail-connect.net
80.254.138.176	PTR	not.assigned.by.all-connect.net
80.254.138.181	PTR	not.assigned.by.all-connect.net
80.254.138.201	A	serv01.gronmayer.com
80.254.138.205	A	serv02.gronmayer.com
80.254.138.217	A	serv02.fabial.de
80.254.138.221	A+PTR	serv01.ptbs-hilfe.de
80.254.138.225	A	serv02.ptbs-hilfe.de