Robtex

Up: 216.238.64.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 216.238.80.0/21
Down right: 216.238.88.0/21

IP	Type	Hostname
216.238.81.98	PTR	ns1648.ztomy.com
216.238.83.146	PTR	ns1648.ztomy.com
216.238.84.19	PTR	ns1648.ztomy.com
216.238.84.48	PTR	ns1648.ztomy.com
216.238.84.131	PTR	ns1648.ztomy.com
216.238.93.209	PTR	ns1648.ztomy.com
216.238.94.4	PTR	ns1648.ztomy.com
216.238.94.80	PTR	null
216.238.94.211	PTR	null