Robtex

Up: 216.221.224.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 216.221.224.0/25
Down right: 216.221.224.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.221.224.15	PTR	switchanddata.com
216.221.224.16	A	paix.net
216.221.224.16	A	ix.sv2.equinix.com
216.221.224.18	A	ocs-us.equinix.com
216.221.224.32	A	www.switchandata.com
216.221.224.32	A	ap.equinix.com
216.221.224.32	A	equinix.ch
216.221.224.42	A+PTR	help.equinix.com
216.221.224.53	PTR	ecc.sv2.equinix.com
216.221.224.53	A	ecc.equinix.com
216.221.224.58	A+PTR	service-now.equinix.com
216.221.224.68	PTR	sso.equinix.com
216.221.224.72	A+PTR	sv2lxnsauth01.equinix.com
216.221.224.73	A+PTR	sv2lxnsauth02.equinix.com
216.221.224.74	A	sv2lxnsres01.equinix.com
216.221.224.87	PTR	sv2ironport02.equinix.com
216.221.224.87	A	sv2ironport.equinix.com
216.221.224.199	A	jameshenze.com