Robtex

Up: 216.249.224.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 216.249.232.0/22
Down right: 216.249.236.0/22

IP	Type	Hostname
216.249.232.0	A+PTR	0.232.249.216.unassigned.sdncommunications.com
216.249.232.3	A	mail.minercountysd.org
216.249.232.11	PTR	cust.109028.bntpsdae02r.sdnet.net
216.249.233.0	A+PTR	0.233.249.216.unassigned.sdncommunications.com
216.249.234.0	A+PTR	0.234.249.216.unassigned.sdncommunications.com
216.249.234.155	PTR	cust.109028.bntpsdae02r.sdnet.net
216.249.234.178	PTR	cust.109028.bntpsdae02r.sdnet.net
216.249.234.199	A	199.234.249.216.unassigned.sdncommunications.com
216.249.234.227	PTR	cust.109028.bntpsdae02r.sdnet.net
216.249.235.0	A+PTR	0.235.249.216.unassigned.sdncommunications.com
216.249.235.1	PTR	1.235.249.216.unassigned.sdncommunications.com
216.249.235.33	PTR	cust.109028.bntpsdae02r.sdnet.net
216.249.235.51	PTR	cust.109028.bntpsdae02r.sdnet.net
216.249.235.154	PTR	cust.109028.bntpsdae02r.sdnet.net
216.249.236.107	PTR	cust.114559.sxflsdch38r.sdnet.net
216.249.236.240	PTR	cust.114559.sxflsdch38r.sdnet.net
216.249.237.11	PTR	cust.114559.sxflsdch38r.sdnet.net
216.249.237.33	PTR	cust.114559.sxflsdch38r.sdnet.net
216.249.237.88	PTR	cust.114559.sxflsdch38r.sdnet.net
216.249.238.103	A	brunick.net
216.249.238.192	A+PTR	192.238.249.216.unassigned.sdncommunications.com
216.249.239.15	A	15.239.249.216.unassigned.sdncommunications.com
216.249.239.89	PTR	89.239.249.216.unassigned.sdncommunications.com
216.249.239.153	PTR	cust.114559.sxflsdch38r.sdnet.net
216.249.239.235	PTR	cust.114559.sxflsdch38r.sdnet.net