Robtex

Up: 188.65.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 188.65.52.0/23
Down right: 188.65.54.0/23

IP	Type	Hostname
188.65.53.0	A+PTR	188-65-53-0.achinsk.net
188.65.54.0	PTR	188-65-54-0.achinsk.net
188.65.54.61	A+PTR	188-65-54-61.achinsk.net
188.65.54.80	A+PTR	188-65-54-80.achinsk.net
188.65.55.254	A+PTR	188-65-55-254.achinsk.net