Robtex

Up: 31.131.254.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 31.131.254.0/25
Down right: 31.131.254.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.131.254.5	PTR	ns2.selectel.org
31.131.254.5	A	ns1.academcloud.ru
31.131.254.5	A	ns2.extpoint.com
31.131.254.10	PTR	ns4.selectel.org
31.131.254.10	A	ns4.selectel.info
31.131.254.10	A	ns4.it-bureau.ru
31.131.254.15	A+PTR	rs2.selectel.org
31.131.254.20	A+PTR	ns2.vscale.io
31.131.254.25	A	rs2.vscale.io