Robtex

Up: 23.95.21.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 23.95.21.128/26
Down right: 23.95.21.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
23.95.21.134	PTR	23-95-21-134-host.colocrossing.com
23.95.21.137	PTR	23-95-21-137-host.colocrossing.com
23.95.21.138	PTR	23-95-21-138-host.colocrossing.com
23.95.21.140	PTR	23-95-21-140-host.colocrossing.com
23.95.21.140	A	mail.gand-khujli.com
23.95.21.140	A	mail.gandkhujli.com
23.95.21.142	PTR	23-95-21-142-host.colocrossing.com
23.95.21.145	PTR	23-95-21-145-host.colocrossing.com
23.95.21.158	PTR	23-95-21-158-host.colocrossing.com
23.95.21.168	PTR	23-95-21-168-host.colocrossing.com
23.95.21.169	PTR	23-95-21-169-host.colocrossing.com
23.95.21.171	PTR	23-95-21-171-host.colocrossing.com
23.95.21.172	PTR	23-95-21-172-host.colocrossing.com
23.95.21.179	PTR	23-95-21-179-host.colocrossing.com
23.95.21.183	PTR	23-95-21-183-host.colocrossing.com
23.95.21.187	PTR	23-95-21-187-host.colocrossing.com
23.95.21.188	PTR	23-95-21-188-host.colocrossing.com
23.95.21.190	PTR	23-95-21-190-host.colocrossing.com
23.95.21.191	PTR	23-95-21-191-host.colocrossing.com
23.95.21.193	PTR	23-95-21-193-host.colocrossing.com
23.95.21.197	PTR	23-95-21-197-host.colocrossing.com
23.95.21.200	PTR	23-95-21-200-host.colocrossing.com
23.95.21.202	PTR	23-95-21-202-host.colocrossing.com
23.95.21.205	PTR	23-95-21-205-host.colocrossing.com
23.95.21.216	PTR	23-95-21-216-host.colocrossing.com
23.95.21.217	PTR	23-95-21-217-host.colocrossing.com
23.95.21.220	PTR	23-95-21-220-host.colocrossing.com
23.95.21.224	PTR	23-95-21-224-host.colocrossing.com
23.95.21.225	PTR	23-95-21-225-host.colocrossing.com
23.95.21.233	PTR	23-95-21-233-host.colocrossing.com
23.95.21.237	PTR	23-95-21-237-host.colocrossing.com
23.95.21.238	PTR	23-95-21-238-host.colocrossing.com
23.95.21.240	PTR	23-95-21-240-host.colocrossing.com
23.95.21.241	PTR	23-95-21-241-host.colocrossing.com
23.95.21.243	PTR	23-95-21-243-host.colocrossing.com
23.95.21.244	PTR	23-95-21-244-host.colocrossing.com