Robtex

Up: 116.89.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 116.89.64.0/23
Down right: 116.89.66.0/23

IP	Type	Hostname
116.89.65.8	PTR	8.65.89.116.starhub.net.sg
116.89.65.19	PTR	19.65.89.116.starhub.net.sg
116.89.65.44	PTR	44.65.89.116.starhub.net.sg
116.89.65.55	PTR	55.65.89.116.starhub.net.sg
116.89.65.57	PTR	57.65.89.116.starhub.net.sg
116.89.65.84	PTR	84.65.89.116.starhub.net.sg
116.89.65.105	PTR	105.65.89.116.starhub.net.sg
116.89.65.108	PTR	108.65.89.116.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
116.89.65.198	PTR	198.65.89.116.starhub.net.sg
116.89.65.204	PTR	204.65.89.116.starhub.net.sg
116.89.65.245	PTR	245.65.89.116.starhub.net.sg
116.89.65.247	PTR	247.65.89.116.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
116.89.66.104	PTR	104.66.89.116.starhub.net.sg
116.89.66.107	PTR	107.66.89.116.starhub.net.sg
116.89.66.116	PTR	116.66.89.116.starhub.net.sg
116.89.66.141	PTR	141.66.89.116.starhub.net.sg
116.89.66.155	PTR	155.66.89.116.starhub.net.sg
116.89.66.174	PTR	174.66.89.116.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
116.89.66.237	PTR	237.66.89.116.starhub.net.sg