Robtex

Up: 216.110.208.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 216.110.208.0/25
Down right: 216.110.208.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.110.208.22	PTR	smtp.nrtoday.com
216.110.208.22	PTR	smtp.newsreview.info
216.110.208.23	PTR	ftp.newsreview.info
216.110.208.68	PTR	www.fccfurn.com
216.110.208.100	PTR	barracuda.tmscallcenters.com
216.110.208.114	PTR	mail.dcipa.com
216.110.208.116	PTR	mail.dcipa.com
216.110.208.123	A	mustbuytechnology.com
216.110.208.158	A+PTR	mail.douglaselectric.com
216.110.208.158	PTR	mail.douglaselectic.coop
216.110.208.158	A+PTR	zimbra.douglasfast.net
216.110.208.214	PTR	smtp.umpqua.edu
216.110.208.214	PTR	www.umpqua.edu
216.110.208.214	A+PTR	smtp.umpqua.cc.or.us