Robtex

Up: 23.19.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 23.19.136.0/22
Down right: 23.19.140.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
23.19.138.19	A+PTR	chi1-02.edge.scaleengine.net
23.19.138.19	A	www.samaa.tv
23.19.138.19	A	us.edge.anycastcdn.net
23.19.138.42	PTR	puravida.allnewdns.com
23.19.138.42	A	ohrehabstaffing.com
23.19.138.42	A	takescreenshots.com
23.19.138.43	PTR	web.snapito.com
23.19.138.82	A	openvz1.virtualsrv.com
23.19.138.152	PTR	23-19-138-152.rdns.as15003.net
23.19.141.173	A	don-cramer.com
23.19.142.2	PTR	voxe.crytomonde.com