Robtex

Up: 216.221.232.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 216.221.232.0/25
Down right: 216.221.232.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.221.232.3	A	glb1.equinix.com
216.221.232.9	A	equinixgsko.com
216.221.232.27	A+PTR	sv2ironport01.equinix.com
216.221.232.41	A+PTR	da1.equinix.com
216.221.232.48	A	equinixypinformationtechnology.com
216.221.232.48	A	ad-ix.org
216.221.232.48	A	ad-ix.net
216.221.232.61	PTR	sv2misentry01_old1.equinix.com
216.221.232.61	A	misentryo365.wip.equinix.com
216.221.232.67	A+PTR	sv2dns01.equinix.com
216.221.232.99	A+PTR	webmail-sv.equinix.com
216.221.232.99	A	webmail.wip.equinix.com
216.221.232.107	A+PTR	git.equinix.com
216.221.232.117	PTR	ix.sv2.equinix.com
216.221.232.117	A	ix.wip.equinix.com
216.221.232.129	PTR	nat1-mis.equinix.com