Robtex

Up: 23.66.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 23.66.12.0/23
Down right: 23.66.14.0/23

IP	Type	Hostname
23.66.12.1	PTR	a23-66-12-1.deploy.static.akamaitechnologies.com
23.66.13.117	A+PTR	a23-66-13-117.deploy.static.akamaitechnologies.com
23.66.14.2	A	a23-66-14-2.deploy.akamaitechnologies.com
23.66.15.148	A	a23-66-15-148.deploy.akamaitechnologies.com
23.66.15.255	PTR	a23-66-15-255.deploy.akamaitechnologies.com