Robtex

Up: 1.23.240.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 1.23.240.0/25
Down right: 1.23.240.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
1.23.240.14	PTR	mail.aquamaritime.com
1.23.240.18	PTR	timail.tokheimindia.com
1.23.240.83	A	mx1.vertexgroup.co.in
1.23.240.83	A	mail.shelltransource.com
1.23.240.83	A	mx1.shelltransource.com
1.23.240.154	A+PTR	thinqpharma.in
1.23.240.163	A+PTR	timail.tokheimindia.com
1.23.240.170	PTR	mail.pvn.in
1.23.240.170	A	mail.kandui.in
1.23.240.205	A	www.riyabusinesstravel.com
1.23.240.205	A	riyabusinesstravel.com
1.23.240.205	A	ourplb.com