Robtex

Up: 185.31.144.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 185.31.144.0/23
Down right: 185.31.146.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
185.31.144.0	A+PTR	185-31-144-0.computest.nl
185.31.144.1	A+PTR	185-31-144-1.computest.nl
185.31.144.4	A+PTR	185-31-144-4.computest.nl
185.31.144.7	A+PTR	185-31-144-7.computest.nl
185.31.144.9	A+PTR	185-31-144-9.computest.nl
185.31.144.9	A	collaborator.nl
185.31.144.9	A	mail.collaborator.nl
185.31.144.13	A+PTR	185-31-144-13.computest.nl
185.31.144.14	A+PTR	185-31-144-14.computest.nl
185.31.144.21	A+PTR	185-31-144-21.computest.nl
185.31.144.22	A	185-31-144-22.computest.nl
185.31.144.24	A+PTR	185-31-144-24.computest.nl
185.31.144.31	A+PTR	mail-relay.computest.nl
185.31.144.33	A+PTR	185-31-144-33.computest.nl
185.31.144.33	A	computest-challenge.me
185.31.144.52	PTR	185-31-144-52.computest.nl
185.31.144.52	A	www.cupfighters.com
185.31.144.52	A	cupfighters.com
185.31.144.224	A+PTR	185-31-144-224.computest.nl
185.31.144.224	A	agent2.computest.nl
185.31.145.130	A	agent3.computest.nl
185.31.146.182	A+PTR	185-31-146-182.computest.nl
185.31.147.71	PTR	185-31-147-71.computest.nl
185.31.147.90	A	185-31-147-90.computest.nl
185.31.147.103	A	185-31-147-103.computest.nl
185.31.147.206	A+PTR	185-31-147-206.computest.nl
185.31.147.224	PTR	185-31-147-224.computest.nl