Robtex

Up: 193.57.56.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 193.57.60.0/23
Down right: 193.57.62.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.57.60.1	A+PTR	193-57-60-1.allnextcloud.com
193.57.60.1	A	allnextcloud.com
193.57.60.2	A+PTR	193-57-60-2.allnextcloud.com
193.57.60.2	A	ns1.allnextcloud.com
193.57.60.3	PTR	193-57-60-3.allnextcloud.com
193.57.60.131	PTR	193.57.60.131.static.as201206.net
193.57.60.131	A	dalili.eu
193.57.60.131	A	mail.kadry.de
193.57.61.6	A+PTR	seerena.net