Robtex

Up: 172.235.128.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 172.235.128.0/20
Down right: 172.235.144.0/20

IP	Type	Hostname
172.235.139.2	PTR	a172-235-139-2.deploy.static.akamaitechnologies.com
172.235.141.130	PTR	a172-235-141-130.deploy.static.akamaitechnologies.com
172.235.141.131	PTR	a172-235-141-131.deploy.static.akamaitechnologies.com