Robtex

Up: 192.231.138.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.231.139.0/25
Down right: 192.231.139.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.231.139.1	A+PTR	drums.net
192.231.139.2	A+PTR	mail.gwha.com
192.231.139.3	A	ftp.gwha.com
192.231.139.14	PTR	gwha.com
192.231.139.14	A	bouldercams.com
192.231.139.14	A	www.gogaga.com
192.231.139.18	A	goblingo.com
192.231.139.18	A	environmentalbank.com
192.231.139.18	A	gogaga.com
192.231.139.20	A	ns0.gidr.org
192.231.139.20	A	gidr.org
192.231.139.181	PTR	bengtcg.com
192.231.139.181	PTR	bugsconsult.com
192.231.139.181	PTR	clubvelo.com