Robtex

Up: 66.90.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.90.24.0/23
Down right: 66.90.26.0/23

IP	Type	Hostname
66.90.24.92	PTR	scsybwifiuser92.smartcity.net
66.90.25.31	PTR	node.smartcityon-line.com
66.90.26.11	PTR	node.smartcity.net
66.90.26.30	PTR	node.smartcity.net
66.90.26.50	PTR	node.smartcity.net
66.90.26.56	PTR	node.smartcityon-line.com
66.90.26.73	PTR	node.smartcity.net
66.90.26.75	PTR	node.smartcityon-line.com
66.90.26.93	PTR	node.smartcity.net
66.90.26.95	PTR	node.smartcity.net
66.90.26.109	PTR	node.smartcity.net
66.90.26.134	PTR	node.smartcityon-line.com
66.90.26.153	PTR	node.smartcity.net
66.90.26.156	PTR	node.smartcity.net
66.90.26.159	PTR	node.smartcity.net
66.90.26.219	PTR	node.smartcity.net
66.90.26.227	PTR	node.smartcity.net
66.90.26.245	PTR	node.smartcityon-line.com
66.90.27.42	PTR	node.smartcity.net
66.90.27.50	PTR	node.smartcityon-line.com
66.90.27.73	PTR	node.smartcityon-line.com
66.90.27.98	PTR	node.smartcityon-line.com
66.90.27.106	PTR	node.smartcity.net
66.90.27.199	PTR	node.smartcity.net