Robtex

Up: 216.52.242.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 216.52.242.0/25
Down right: 216.52.242.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.52.242.2	PTR	216-52-242-2.fwd.linkedin.com
216.52.242.13	A+PTR	216-52-242-13.fwd.linkedin.com
216.52.242.14	PTR	216-52-242-14.fwd.linkedin.com
216.52.242.17	A+PTR	mail07.linkedin.com
216.52.242.18	A+PTR	mail08.linkedin.com
216.52.242.19	A+PTR	mail09.linkedin.com
216.52.242.20	A+PTR	mail10.linkedin.com
216.52.242.21	A	mp03.linkedin.com
216.52.242.22	A+PTR	mp04.linkedin.com
216.52.242.30	A	ela4-xns02.linkedin.com
216.52.242.63	PTR	216-52-242-63.fwd.linkedin.com
216.52.242.71	PTR	216-52-242-71.fwd.linkedin.com
216.52.242.80	A+PTR	linkedin-ela4.com
216.52.242.80	PTR	la.linkedin.com
216.52.242.80	PTR	sb_06053df158314df2.linkedin.com
216.52.242.85	A	www.lmodules.com
216.52.242.85	A	cdn.lmodules.com
216.52.242.86	A	justinvicory.com
216.52.242.86	A	linked-ln.com
216.52.242.86	A	linkedin.com.sg
216.52.242.91	A+PTR	in.linkedin-ela4.com
216.52.242.92	PTR	rtb-us1.linkedin.com
216.52.242.93	PTR	touch-static.linkedin.com
216.52.242.93	PTR	touch.www.linkedin.com
216.52.242.94	A	tablet.www.linkedin.com
216.52.242.95	PTR	blackflipper.com
216.52.242.95	PTR	connectedhq.com
216.52.242.95	PTR	feedera.com
216.52.242.97	PTR	polls-static.linkedin.com
216.52.242.97	PTR	polls.linkedin.com
216.52.242.101	A+PTR	tablet-stg.www.linkedin.com
216.52.242.105	PTR	touch.linkedin.com
216.52.242.107	A	embed.lmodules.com
216.52.242.112	A	cb66-45-119-255.slideshare.net
216.52.242.112	A	174.37.101.125-static.reverse.slideshare.net
216.52.242.112	A	bunte.slideshare.net
216.52.242.113	PTR	cctld.linkedin.com
216.52.242.116	PTR	216-52-242-116.fwd.linkedin.com
216.52.242.116	A	rapportive.linkedin.com
216.52.242.116	A	intro.linkedin.com
216.52.242.117	PTR	216-52-242-117.fwd.linkedin.com
216.52.242.117	A	slideshare.www.linkedin.com
216.52.242.133	A	mail51-v52.linkedin.com
216.52.242.134	A+PTR	mail52-v52.linkedin.com
216.52.242.135	A+PTR	mail53-v52.linkedin.com
216.52.242.136	A	mail54-v52.linkedin.com
216.52.242.137	A	mail55-v52.linkedin.com
216.52.242.138	A+PTR	mail56-v52.linkedin.com
216.52.242.139	A	mail57-v52.linkedin.com
216.52.242.165	A+PTR	216-52-242-165.fwd.linkedin.com
216.52.242.175	A	mail46-v52.linkedin.com
216.52.242.176	A	mail47-v52.linkedin.com
216.52.242.177	A	mail48-v52.linkedin.com
216.52.242.178	A	mail49-v52.linkedin.com