Robtex

Up: 212.19.40.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 212.19.40.0/25
Down right: 212.19.40.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.19.40.5	A+PTR	mail.s.plusline.de
212.19.40.6	A	mail.s.plusline.de
212.19.40.14	A+PTR	ns2.plusline.de
212.19.40.14	A+PTR	ns2.plusline.net
212.19.40.14	A+PTR	ns.s.plusline.de
212.19.40.82	PTR	iserv.planat.de