Robtex

Up: 192.170.136.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.170.137.0/25
Down right: 192.170.137.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.170.137.41	A	vcs-ext.tripadvisor.com
192.170.137.41	A	jg-a.corp.tripadvisor.com
192.170.137.41	A	vcs-expwy01.tripadvisor.com
192.170.137.42	A	vcs-ext.tripadvisor.com
192.170.137.42	A	jg-a.corp.tripadvisor.com
192.170.137.42	A	jg.corp.tripadvisor.com
192.170.137.44	A	hipchat.corp.tripadvisor.com
192.170.137.44	A	hipchat01.drt01.corp.tripadvisor.com
192.170.137.45	A	ftp01.tripadvisor.com
192.170.137.47	A+PTR	ucsexpwayedgedmz01.drt01.corp.tripadvisor.com
192.170.137.49	A	sso.tripadvisor.com
192.170.137.60	A	remote-useast.tripadvisor.com
192.170.137.60	A	remote.edge.corp.tripadvisor.com
192.170.137.91	A	passwordreset.corp.tripadvisor.com
192.170.137.95	A	livestream.corp.tripadvisor.com
192.170.137.98	A	holidaylettings.gr.1.0001.arsmtp.com
192.170.137.98	A	internalhlniumba.com.2.0001.arsmtp.com
192.170.137.98	A	mx.tripadvisor.com
192.170.137.99	A	smtps.tripadvisor.com
192.170.137.99	A	exchange.tripadvisor.com
192.170.137.99	A	exchange-east.tripadvisor.com
192.170.137.100	PTR	exchange-east.tripadvisor.com
192.170.137.100	A	exchange.tripadvisor.com
192.170.137.100	A	exchange-west.tripadvisor.com
192.170.137.101	A+PTR	exchange-east-ht01.tripadvisor.com
192.170.137.102	A+PTR	exchange-east-ht02.tripadvisor.com
192.170.137.104	A	exchange-east-htgw.tripadvisor.com
192.170.137.105	A+PTR	exchange-east-htgw01.tripadvisor.com
192.170.137.106	A+PTR	exchange-east-htgw02.tripadvisor.com