Robtex

Up: 173.222.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 173.222.52.0/23
Down right: 173.222.54.0/23

IP	Type	Hostname
173.222.52.46	A+PTR	a173-222-52-46.deploy.static.akamaitechnologies.com
173.222.52.139	PTR	a173-222-52-139.deploy.static.akamaitechnologies.com
173.222.53.239	A+PTR	a173-222-53-239.deploy.static.akamaitechnologies.com