Robtex

Up: 216.249.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.249.244.0/23
Down right: 216.249.246.0/23

IP	Type	Hostname
216.249.244.0	A+PTR	0.244.249.216.unassigned.sdncommunications.com
216.249.244.12	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.244.145	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.244.201	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.244.229	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.245.0	A+PTR	0.245.249.216.unassigned.sdncommunications.com
216.249.245.23	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.245.64	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.245.92	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.245.99	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.245.169	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.245.175	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.245.238	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.246.0	A+PTR	0.246.249.216.unassigned.sdncommunications.com
216.249.246.111	A+PTR	111.246.249.216.unassigned.sdncommunications.com
216.249.247.0	A+PTR	0.247.249.216.unassigned.sdncommunications.com
216.249.247.141	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.247.189	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.247.224	A+PTR	224.247.249.216.unassigned.sdncommunications.com
216.249.247.245	PTR	cust.138025.sxflsdch38r.sdnet.net
216.249.247.247	PTR	cust.138025.sxflsdch38r.sdnet.net