Robtex

Up: 176.53.128.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 176.53.128.0/23
Down right: 176.53.130.0/23

IP	Type	Hostname
176.53.128.0	PTR	176.53.128.0.not.updated.openip-cs.net
176.53.129.0	PTR	176.53.129.0.not.updated.openip-cs.net
176.53.129.116	PTR	176.53.129.116.not.updated.openip-cs.net
176.53.129.175	A	mail.civa.fr
176.53.130.0	PTR	176.53.130.0.not.updated.openip-cs.net
176.53.130.149	PTR	176.53.130.149.not.updated.openip-cs.net
176.53.131.0	PTR	176.53.131.0.not.updated.openip-cs.net
176.53.131.255	PTR	l176-53-131-255.cn.ru