Robtex

Up: 58.185.10.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 58.185.11.0/25
Down right: 58.185.11.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
58.185.11.53	PTR	webmail.fineliving.com.sg
58.185.11.53	PTR	webmail.leathermaster.com.sg
58.185.11.53	PTR	webmail.mgc.com.sg
58.185.11.132	A+PTR	mail.tec-hub.com
58.185.11.132	A	mail.intercept-asia.com
58.185.11.162	A+PTR	home.yeos.com
58.185.11.168	A	ns1.yeos.com.hk
58.185.11.168	A	yeos.com.sg
58.185.11.168	A	ns2.yeoschina.com
58.185.11.169	A	v01.yeos.com.sg
58.185.11.172	A	www.yeos.com.sg
58.185.11.243	A+PTR	mail.softenger.com
58.185.11.243	A	net.softenger.com
58.185.11.244	A	mail.softenger.com
58.185.11.244	A	smashgaps.com
58.185.11.244	A	mail.smashgaps.com