Robtex

Up: 192.0.81.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 192.0.81.128/26
Down right: 192.0.81.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.0.81.161	A	mx1.dfw.wordpress.com
192.0.81.191	A	collector1.statsd.dfw.wordpress.com
192.0.81.199	A	mc.wordpress.com
192.0.81.199	A	mc.dfw.wordpress.com
192.0.81.199	A	mc.a8c.com
192.0.81.237	A+PTR	smtp3-1.dfw.wordpress.com
192.0.81.238	A+PTR	smtp3-2.dfw.wordpress.com
192.0.81.245	A	mogilefs.dfw.wordpress.com
192.0.81.247	A	*.svn.automattic.com
192.0.81.247	A	deploy-svn.automattic.com
192.0.81.248	A	vip-svn.wordpress.com
192.0.81.250	A	*.domains.writerscurb.wordpress.com
192.0.81.250	A	extranet.mobitruckltangki.wordpress.com
192.0.81.250	A	bos-ns1.bos.tangkipabrik.wordpress.com