Robtex

Up: 216.106.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.106.220.0/23
Down right: 216.106.222.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.106.220.0	A+PTR	0.220.106.216.unassigned.sdncommunications.com
216.106.220.1	PTR	1.220.106.216.unassigned.sdncommunications.com
216.106.220.8	A	spencerquarriesinc.com
216.106.220.8	A	mail.spencerquarriesinc.com
216.106.220.18	A+PTR	mail.feterl.com
216.106.220.24	A	mainserver.sdimfg.com
216.106.220.24	A	mail.sdimfg.com
216.106.220.26	PTR	dsl.triotel.158551.sxflsdch39r.sdnet.net
216.106.220.74	A	mx.triotel.com
216.106.220.74	A	triotel.com
216.106.220.93	A	mail.salemchiropracticclinic.com
216.106.220.116	A	remote.sharpind.com
216.106.220.116	A	mail.sharpind.com
216.106.220.125	A	mtplains.com
216.106.220.125	A	mail.mtplains.com
216.106.220.125	A	mail.mountainplainsevaluation.com
216.106.220.126	PTR	126.220.106.216.unassigned.sdncommunications.com
216.106.220.138	PTR	138.220.106.216.unassigned.sdncommunications.com
216.106.220.138	A	mail.laceysfarmacy.com
216.106.221.0	A+PTR	0.221.106.216.unassigned.sdncommunications.com
216.106.221.1	A+PTR	1.221.106.216.unassigned.sdncommunications.com
216.106.221.18	A+PTR	18.221.106.216.unassigned.sdncommunications.com
216.106.221.60	A	60.221.106.216.unassigned.sdncommunications.com
216.106.221.73	PTR	dsl.triotel.138160.sxflsdch39r.sdnet.net
216.106.221.84	A	84.221.106.216.unassigned.sdncommunications.com
216.106.221.89	A+PTR	89.221.106.216.unassigned.sdncommunications.com
216.106.221.142	A+PTR	142.221.106.216.unassigned.sdncommunications.com
216.106.221.217	PTR	217.221.106.216.unassigned.sdncommunications.com
216.106.221.231	PTR	231.221.106.216.unassigned.sdncommunications.com
216.106.222.0	A+PTR	0.222.106.216.unassigned.sdncommunications.com
216.106.222.36	PTR	dsl.triotel.138160.sxflsdch39r.sdnet.net
216.106.222.50	PTR	50.222.106.216.unassigned.sdncommunications.com
216.106.222.50	A	ebizliving.com
216.106.222.50	A	net-4-u.com
216.106.222.182	A+PTR	182.222.106.216.unassigned.sdncommunications.com
216.106.222.229	PTR	229.222.106.216.unassigned.sdncommunications.com
216.106.223.0	A+PTR	0.223.106.216.unassigned.sdncommunications.com
216.106.223.255	A+PTR	255.223.106.216.unassigned.sdncommunications.com