Robtex

Up: 165.21.100.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 165.21.100.0/25
Down right: 165.21.100.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
165.21.100.6	A+PTR	nimrod2.singnet.com.sg
165.21.100.8	A+PTR	boronia2.singnet.com.sg
165.21.100.8	A	boronia.singnet.com.sg
165.21.100.10	A+PTR	dnssec5.singnet.com.sg
165.21.100.11	A+PTR	dnssec3.singnet.com.sg
165.21.100.11	A	dnssec2.singnet.com
165.21.100.11	A	dnssec3.singnet.com
165.21.100.12	A+PTR	nocoltp.singnet.com.sg
165.21.100.15	A+PTR	tp-ism.singnet.com.sg
165.21.100.17	A+PTR	tp-net.singnet.com.sg
165.21.100.18	A+PTR	tpcool2.singnet.com.sg
165.21.100.20	PTR	boronia.singnet.com.sg
165.21.100.26	A+PTR	sellyoak.singnet.com.sg
165.21.100.36	A+PTR	c1-cat65.singnet.com.sg
165.21.100.58	A+PTR	staff.singnet.com.sg
165.21.100.59	A+PTR	sn-sintp1-a0201.singnet.com.sg
165.21.100.59	A	www.idrive.com.sg
165.21.100.59	A	cityline.com.sg
165.21.100.60	A	customer.singnet.com.sg
165.21.100.88	A+PTR	dnscache2.singnet.com.sg
165.21.100.88	A	dnscache2.singnet.com
165.21.100.89	A+PTR	dnscache2a.singnet.com.sg
165.21.100.90	A	dnscache2e.singnet.com.sg
165.21.100.94	A+PTR	dnscache2d.singnet.com.sg
165.21.100.209	A+PTR	entario.singnet.com.sg
165.21.100.253	PTR	gswths.singnet.com.sg