Robtex

Up: 216.126.56.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 216.126.56.0/25
Down right: 216.126.56.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.126.56.210	A+PTR	corpserver.meanservers.com
216.126.56.210	A	snowcapindustries.com
216.126.56.210	A	mail.snowcapindustries.com
216.126.56.212	A	mail.peaktera.com
216.126.56.213	PTR	meanservers.com
216.126.56.213	A	mail2.meanservers.com
216.126.56.213	A	mail.snowfirehosting.net
216.126.56.218	A+PTR	mirror.den01.meanservers.net