Robtex

Up: 216.117.0.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 216.117.2.0/24
Down right: 216.117.3.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.117.2.1	PTR	in-elk-216-117-2-1.skylinecorp.com
216.117.2.15	A	mail.sigmainfo.com
216.117.2.30	A	dashboard.sigmainfo.com
216.117.2.180	PTR	shodan.io
216.117.2.180	A	domains.shodanhq.com
216.117.2.180	A	ce.shodan.io
216.117.3.230	A	ns2.actsgroup.net
216.117.3.230	A	ns3.actsgroup.net
216.117.3.232	PTR	plesk001.actsgroup.net
216.117.3.232	A	mynetchurch.net
216.117.3.232	A	actsgroup.net
216.117.3.237	A	mail.nacba.net
216.117.3.237	A	mail.bearcreekumc.org
216.117.3.237	A	mail.zionbaptistchurch.net
216.117.3.238	A	thechurchnetwork.com
216.117.3.238	A	ministrypay.com
216.117.3.241	PTR	host-open.actsgroup.net
216.117.3.241	A	nacba.net
216.117.3.245	A+PTR	mail2.penguinpeople.net
216.117.3.245	A	mail.penguinpeople.net