Robtex

Up: 216.106.232.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.106.232.0/23
Down right: 216.106.234.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.106.232.1	A+PTR	1.232.106.216.unassigned.sdncommunications.com
216.106.232.23	A+PTR	23.232.106.216.unassigned.sdncommunications.com
216.106.232.29	A	mail.brandonlutheran.org
216.106.232.32	A+PTR	mailserv.aaexpressinc.com
216.106.232.36	A	mail.verdebioenergy.com
216.106.232.53	A+PTR	53.232.106.216.unassigned.sdncommunications.com
216.106.232.53	A	travisgraves.info
216.106.232.53	A	gravesitsolutionsonlinebackupsystem.com
216.106.232.54	PTR	mail.cityofbrandon.org
216.106.232.81	PTR	81.232.106.216.unassigned.sdncommunications.com
216.106.232.238	PTR	cust.114559.sxflsdch38r.sdnet.net
216.106.233.0	A+PTR	0.233.106.216.unassigned.sdncommunications.com
216.106.233.196	A+PTR	196.233.106.216.unassigned.sdncommunications.com
216.106.234.37	PTR	37.234.106.216.unassigned.sdncommunications.com
216.106.234.51	PTR	51.234.106.216.unassigned.sdncommunications.com
216.106.234.90	PTR	90.234.106.216.unassigned.sdncommunications.com
216.106.234.91	PTR	91.234.106.216.unassigned.sdncommunications.com
216.106.234.117	PTR	cust.114559.sxflsdch38r.sdnet.net
216.106.234.122	PTR	122.234.106.216.unassigned.sdncommunications.com
216.106.234.126	A+PTR	126.234.106.216.unassigned.sdncommunications.com
216.106.235.5	A+PTR	5.235.106.216.unassigned.sdncommunications.com
216.106.235.141	PTR	141.235.106.216.unassigned.sdncommunications.com
216.106.235.244	PTR	244.235.106.216.unassigned.sdncommunications.com