Robtex

Up: 140.99.16.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 140.99.16.0/25
Down right: 140.99.16.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
140.99.16.0	PTR	network.deru.net
140.99.16.1	PTR	ns1-gw.deru.net
140.99.16.2	PTR	ns1.deru.net
140.99.16.6	A	edscape.deru.com
140.99.16.17	PTR	xxxx-gw.deru.com
140.99.16.18	A	inkswitch.deru.com
140.99.16.25	A	capstone-gw.deru.com
140.99.16.26	A	capstone.deru.com
140.99.16.32	PTR	network.controlscan.deru.com
140.99.16.34	PTR	scanner.controlscan.com
140.99.16.40	PTR	network.controlscan.deru.com
140.99.16.42	PTR	scanner.controlscan.com
140.99.16.74	A	mail.burickcommunication.com
140.99.16.110	PTR	awardvacations.com
140.99.16.122	PTR	arizonasportsfans.com
140.99.16.142	A	mail.royaltemporaries.net
140.99.16.142	A	mail.thecyberpit.com
140.99.16.142	A	mail.royaltechnical.net
140.99.16.148	PTR	network.controlscan.deru.com
140.99.16.150	PTR	scanner.controlscan.com
140.99.16.154	PTR	ilmatar.deru.net
140.99.16.162	PTR	backup3.deru.net
140.99.16.170	PTR	lodesys.com
140.99.16.176	PTR	network.deru.net
140.99.16.177	PTR	ns6-gw.deru.net
140.99.16.210	A	roadconnect.deru.com
140.99.16.218	A	mx.damnetwork.net