Robtex

Up: 193.101.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 193.101.24.0/22
Down right: 193.101.28.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.101.24.0	PTR	0.infoscore.24.101.193.in-addr.arpa
193.101.24.3	PTR	3.infoscore.24.101.193.in-addr.arpa
193.101.24.3	A	badifsproxy0001.arvato-infoscore.net
193.101.24.61	A+PTR	mail.infoscore.de
193.101.24.61	A	mail.arvatoinfoscore.at
193.101.24.61	A	mail.arvato-infoscore.pl
193.101.24.83	A	ftp.infoscore.de
193.101.24.125	A	gate2.infoscore.de
193.101.24.242	A	hl.atlas.winet.dcc.ufmg.br
193.101.24.245	A	surf.infoscore.de
193.101.25.57	PTR	57.bertelsmann.25.101.193.in-addr.arpa
193.101.25.187	PTR	187.bertelsmann.25.101.193.in-addr.arpa