Robtex

Up: 155.69.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 155.69.24.0/23
Down right: 155.69.26.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
155.69.24.23	A+PTR	mail.ntu.edu.sg
155.69.24.57	A+PTR	repository.ntu.edu.sg
155.69.24.74	PTR	ezlibproxy1.ntu.edu.sg
155.69.24.74	PTR	ezlibproxy3.ntu.edu.sg
155.69.24.74	A	global.factiva.com.ezlibproxy1.ntu.edu.sg
155.69.24.114	PTR	eps.ntu.edu.sg
155.69.24.172	A+PTR	ezproxylogin1.ntu.edu.sg
155.69.24.177	A+PTR	bot.ntu.edu.sg
155.69.24.193	A+PTR	dr.ntu.edu.sg
155.69.24.196	A	dr.ntu.edu.sg
155.69.25.22	A+PTR	autodiscover.ntu.edu.sg
155.69.25.22	A+PTR	webmail.ntu.edu.sg
155.69.25.98	A	iupap.org
155.69.25.98	A	www.iupap.org
155.69.25.195	A	sdc.ntu.edu.sg