Robtex

Up: 116.89.64.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 116.89.64.0/21
Down right: 116.89.72.0/21

IP	Type	Hostname
116.89.65.19	PTR	19.65.89.116.starhub.net.sg
116.89.65.146	PTR	146.65.89.116.starhub.net.sg
116.89.65.163	PTR	163.65.89.116.starhub.net.sg
116.89.66.17	PTR	17.66.89.116.starhub.net.sg
116.89.66.64	PTR	64.66.89.116.starhub.net.sg
116.89.66.96	PTR	96.66.89.116.starhub.net.sg
116.89.66.193	PTR	193.66.89.116.starhub.net.sg
116.89.66.209	PTR	209.66.89.116.starhub.net.sg
116.89.73.2	PTR	cm2.iota73.maxonline.com.sg
116.89.74.42	A	mail.vicube.com