Robtex

Up: 23.53.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 23.53.40.0/23
Down right: 23.53.42.0/23

IP	Type	Hostname
23.53.40.8	PTR	a23-53-40-8.deploy.akamaitechnologies.com
23.53.40.26	PTR	a23-53-40-26.deploy.static.akamaitechnologies.com
23.53.40.26	A	a23-53-40-26.deploy.akamaitechnologies.com
23.53.40.80	A+PTR	a23-53-40-80.deploy.static.akamaitechnologies.com
23.53.40.94	PTR	a23-53-40-94.deploy.akamaitechnologies.com
23.53.40.113	PTR	a23-53-40-113.deploy.static.akamaitechnologies.com
23.53.40.127	PTR	a23-53-40-127.deploy.akamaitechnologies.com
23.53.40.168	A	a464.w4.akamai.net.0.1.cn.akamaitech.net
23.53.40.170	PTR	a23-53-40-170.deploy.akamaitechnologies.com
23.53.40.170	A	a464.w4.akamai.net.0.1.cn.akamaitech.net
23.53.40.183	PTR	a23-53-40-183.deploy.akamaitechnologies.com
23.53.40.183	A	obotazh.net
23.53.41.4	A+PTR	a23-53-41-4.deploy.static.akamaitechnologies.com
23.53.41.32	A	a1855.w16.akamai.net
23.53.41.40	A	a1522.d.akamai.net.0.1.cn.akamaitech.net
23.53.41.42	A	a1855.w16.akamai.net
23.53.41.48	A+PTR	a23-53-41-48.deploy.static.akamaitechnologies.com
23.53.41.66	A	a1522.d.akamai.net.0.1.cn.akamaitech.net
23.53.41.162	A	a689.g2.akamai.net
23.53.41.203	PTR	a23-53-41-203.deploy.static.akamaitechnologies.com
23.53.41.208	A	a689.g2.akamai.net
23.53.41.208	A	content-archive1.com
23.53.41.226	A	content-archive1.com
23.53.41.232	PTR	a23-53-41-232.deploy.static.akamaitechnologies.com
23.53.42.23	A+PTR	a23-53-42-23.deploy.akamaitechnologies.com
23.53.42.40	PTR	a23-53-42-40.deploy.static.akamaitechnologies.com
23.53.42.61	A+PTR	a23-53-42-61.deploy.static.akamaitechnologies.com
23.53.42.63	PTR	a23-53-42-63.deploy.static.akamaitechnologies.com
23.53.42.81	A	standrewsipswich.com.au
23.53.42.97	A	standrewsipswich.com.au
23.53.42.137	A+PTR	a23-53-42-137.deploy.akamaitechnologies.com
23.53.43.9	PTR	a23-53-43-9.deploy.static.akamaitechnologies.com
23.53.43.24	PTR	a23-53-43-24.deploy.static.akamaitechnologies.com
23.53.43.51	A+PTR	a23-53-43-51.deploy.static.akamaitechnologies.com