Robtex

Up: 216.163.136.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.163.136.0/23
Down right: 216.163.138.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.163.136.22	A	chat2-chi.peiecommerce.com
216.163.136.23	A+PTR	ipartner.playboy.com
216.163.136.24	A	ns1-chi.playboy.com
216.163.136.27	A	ads-admin.playboy.com
216.163.136.34	A	ns2-chi.playboy.com
216.163.136.141	A+PTR	mx01.la.playboy.com
216.163.136.143	A	peiemail.com
216.163.136.144	PTR	mx.la.playboy.com
216.163.136.147	A	peiemail2.com
216.163.137.1	PTR	secure2.playboy.com
216.163.137.2	PTR	secure2.spicetv.com
216.163.137.3	A	tahirkheli.net
216.163.137.7	PTR	playboydaily.com
216.163.137.9	PTR	playboyvideo.com
216.163.137.11	PTR	spiceondemand.com
216.163.137.13	PTR	www.spiceclips.com
216.163.137.14	PTR	boards.playboy.com
216.163.137.16	PTR	tours.playboy.com
216.163.137.18	PTR	playboytvclub.com
216.163.137.20	PTR	pei-ads.playboy.com
216.163.137.23	PTR	plus.playboy.com
216.163.137.25	PTR	down.playboy.com
216.163.137.31	PTR	playboystyle.com
216.163.137.61	A	click.adult.com
216.163.137.61	A	tour.adultrealitypass.com
216.163.137.61	A	root.10dollarporn.com
216.163.137.68	A	dateaplayboymodel.com
216.163.137.75	A	d1.playboy.com
216.163.137.85	A	pei-ads.com
216.163.137.85	A	pei-ads.playboy.com
216.163.137.90	A	down.spicetv.com
216.163.137.90	A	down.adult.com
216.163.137.90	A	down.playboy.com
216.163.137.91	A	virt.adult.com
216.163.137.92	A	virt-cache.spicetv.com
216.163.137.92	A	virt-cache.playboy.com
216.163.137.95	A	pei-ads.spicetv.com
216.163.137.103	A	legal.playboy.com
216.163.137.103	A	legal.spicetv.com
216.163.137.105	A	pei-ads.thesmokingjacket.com
216.163.137.127	A	members.clubjenna.spicetv.com
216.163.137.128	A	wwwsophiarossi.com
216.163.137.128	A	clubjennapinups.com