Robtex

Up: 72.52.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 72.52.24.0/23
Down right: 72.52.26.0/23

IP	Type	Hostname
72.52.24.1	PTR	unknown.prolexic.com
72.52.24.23	PTR	unknown.prolexic.com
72.52.24.48	PTR	unknown.prolexic.com
72.52.24.114	PTR	unknown.prolexic.com
72.52.24.114	A	mail.zohalighting.com
72.52.24.124	PTR	unknown.prolexic.com
72.52.24.134	PTR	a72-52-24-134.deploy.static.akamaitechnologies.com
72.52.24.198	PTR	unknown.prolexic.com
72.52.25.11	PTR	unknown.prolexic.com
72.52.25.63	PTR	unknown.prolexic.com
72.52.25.80	PTR	unknown.prolexic.com
72.52.25.85	PTR	unknown.prolexic.com
72.52.25.95	PTR	unknown.prolexic.com
72.52.25.100	PTR	unknown.prolexic.com
72.52.25.119	PTR	unknown.prolexic.com
72.52.25.132	PTR	unknown.prolexic.com
72.52.25.175	PTR	unknown.prolexic.com
72.52.25.181	PTR	unknown.prolexic.com
72.52.25.185	PTR	unknown.prolexic.com
72.52.25.221	PTR	unknown.prolexic.com
72.52.26.19	PTR	unknown.prolexic.com
72.52.26.26	PTR	unknown.prolexic.com
72.52.26.39	PTR	a72-52-26-39.deploy.static.akamaitechnologies.com
72.52.26.55	PTR	unknown.prolexic.com
72.52.26.79	PTR	unknown.prolexic.com
72.52.26.120	PTR	a72-52-26-120.deploy.static.akamaitechnologies.com
72.52.26.196	PTR	a72-52-26-196.deploy.static.akamaitechnologies.com
72.52.26.207	PTR	unknown.prolexic.com
72.52.26.208	PTR	a72-52-26-208.deploy.static.akamaitechnologies.com
72.52.26.210	PTR	unknown.prolexic.com
72.52.26.223	PTR	ip1367.access-a.sech-iad.netarch.akamai.com
72.52.26.226	PTR	unknown.prolexic.com
72.52.26.237	PTR	a72-52-26-237.deploy.static.akamaitechnologies.com
72.52.26.239	PTR	unknown.prolexic.com
72.52.27.3	PTR	unknown.prolexic.com
72.52.27.16	PTR	unknown.prolexic.com
72.52.27.19	PTR	lo2192.access-a.sech-iad.netarch.akamai.com
72.52.27.31	PTR	unknown.prolexic.com
72.52.27.57	PTR	unknown.prolexic.com
72.52.27.110	PTR	unknown.prolexic.com
72.52.27.208	PTR	unknown.prolexic.com
72.52.27.237	PTR	a72-52-27-237.deploy.static.akamaitechnologies.com