Robtex

Up: 192.31.136.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.31.136.0/25
Down right: 192.31.136.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.31.136.10	A+PTR	ns1.imsg.com
192.31.136.10	A	bart.imsg.com
192.31.136.11	A+PTR	ns2.imsg.com
192.31.136.11	A	lisa.imsg.com
192.31.136.24	A	mail.imsg.com
192.31.136.59	A	mail2.imsg.com
192.31.136.59	A	*.imsg.com
192.31.136.59	A	imsgweb.imsg.com
192.31.136.67	A+PTR	smtp2.imsg.com
192.31.136.69	A+PTR	smtp1.imsg.com
192.31.136.124	A	ns1.imsg.com
192.31.136.124	A	www.imsg.com
192.31.136.124	A	imsg.com
192.31.136.125	A	ns1.imsg.com
192.31.136.125	A	www.imsg.com
192.31.136.125	A	imsg.com
192.31.136.126	A	ns1.imsg.com
192.31.136.126	A	www.imsg.com
192.31.136.126	A	imsg.com
192.31.136.127	A	www.imsg.vn
192.31.136.127	A	imsg.vn