Robtex

Up: 202.156.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 202.156.72.0/23
Down right: 202.156.74.0/23

IP	Type	Hostname
202.156.72.83	PTR	83.72.156.202.starhub.net.sg
202.156.73.28	PTR	28.73.156.202.starhub.net.sg
202.156.73.96	PTR	96.73.156.202.starhub.net.sg
202.156.73.132	PTR	132.73.156.202.starhub.net.sg
202.156.75.12	PTR	12.75.156.202.starhub.net.sg