Robtex

Up: 210.24.48.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 210.24.56.0/22
Down right: 210.24.60.0/22

IP	Type	Hostname
210.24.56.235	A	mail.seadpl.com
210.24.56.243	PTR	mail.smtpl.com.sg
210.24.56.243	A	jcn.com.sg
210.24.56.244	PTR	mail2.jspl.com.sg
210.24.56.248	PTR	mail.jpl.com.sg
210.24.56.248	A	mail.sembcorpmarine.com.sg
210.24.56.250	A+PTR	mail.sembcorpmarine.com.sg
210.24.56.252	A	ipfriends.com
210.24.58.35	A+PTR	smtp2.daiichi.com.sg
210.24.61.34	PTR	mail.cheungwoh.com.sg
210.24.61.34	A	cheungwoh.com.sg