Robtex

Up: 23.53.123.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 23.53.123.128/26
Down right: 23.53.123.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
23.53.123.131	PTR	a23-53-123-131.deploy.static.akamaitechnologies.com
23.53.123.136	A+PTR	a23-53-123-136.deploy.static.akamaitechnologies.com
23.53.123.136	A	f0866f19bd002ffaf844-f4cd6b421e82bbbbacfd882a3da3cc3b.ssl.cf1.rackcdn.com
23.53.123.136	A	f03a3d2fc3e1670b4fcb-8b86c0065f4752045676af1281716b4a.ssl.cf1.rackcdn.com
23.53.123.140	A	2709c128263258e6d723-5feb8e582eefef09679ec931a5d8813a.ssl.cf2.rackcdn.com
23.53.123.140	A	34c0b76523d5a116ae5b-176e551cc97559a193c4d16f9f34706c.ssl.cf2.rackcdn.com
23.53.123.151	A+PTR	a23-53-123-151.deploy.static.akamaitechnologies.com
23.53.123.151	A	e544.g.akamaiedge.net
23.53.123.151	A	www.mediaplex.com
23.53.123.172	A+PTR	a23-53-123-172.deploy.static.akamaitechnologies.com
23.53.123.181	A+PTR	a23-53-123-181.deploy.static.akamaitechnologies.com
23.53.123.204	A+PTR	a23-53-123-204.deploy.static.akamaitechnologies.com
23.53.123.210	PTR	a23-53-123-210.deploy.static.akamaitechnologies.com
23.53.123.219	A+PTR	a23-53-123-219.deploy.static.akamaitechnologies.com
23.53.123.219	A	wildcard.stubhub.com.edgekey.net
23.53.123.224	A	image.tonton.com.my
23.53.123.230	A+PTR	a23-53-123-230.deploy.static.akamaitechnologies.com
23.53.123.239	PTR	a23-53-123-239.deploy.static.akamaitechnologies.com
23.53.123.241	A+PTR	a23-53-123-241.deploy.static.akamaitechnologies.com
23.53.123.254	A+PTR	a23-53-123-254.deploy.static.akamaitechnologies.com
23.53.123.254	A	cdn-lb.vungle.akadns.net