Robtex

Up: 193.124.192.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 193.124.192.0/22
Down right: 193.124.196.0/22

IP	Type	Hostname
193.124.192.0	PTR	0.192.124.193.reverse.teachhosted.com
193.124.192.178	PTR	178.192.124.193.reverse.teachhosted.com
193.124.193.1	PTR	1.193.124.193.reverse.teachhosted.com
193.124.196.0	PTR	0.196.124.193.reverse.teachhosted.com