Robtex

Up: 188.255.144.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 188.255.152.0/22
Down right: 188.255.156.0/22

IP	Type	Hostname
188.255.152.136	PTR	free-152-136.mediaworksit.net
188.255.152.171	PTR	free-152-171.mediaworksit.net
188.255.153.26	PTR	free-153-26.mediaworksit.net
188.255.153.194	PTR	free-153-194.mediaworksit.net
188.255.154.1	PTR	free-154-1.mediaworksit.net
188.255.154.18	PTR	free-154-18.mediaworksit.net
188.255.154.90	PTR	free-154-90.mediaworksit.net
188.255.154.163	PTR	free-154-163.mediaworksit.net
188.255.154.224	PTR	free-154-224.mediaworksit.net
188.255.157.136	PTR	free-157-136.mediaworksit.net
188.255.157.211	PTR	free-157-211.mediaworksit.net
188.255.158.112	PTR	free-158-112.mediaworksit.net
188.255.158.145	PTR	free-158-145.mediaworksit.net