Robtex

Up: 138.19.140.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 138.19.142.0/24
Down right: 138.19.143.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
138.19.142.171	PTR	138019142171.ctinets.com
138.19.142.171	A	ns3.uglab.org
138.19.142.171	A	ns1.uglab.org
138.19.142.253	A+PTR	138019142253.ctinets.com
138.19.143.92	A+PTR	138019143092.ctinets.com
138.19.143.208	A+PTR	138019143208.ctinets.com
138.19.143.208	A	hso.com.hk
138.19.143.215	A+PTR	138019143215.ctinets.com
138.19.143.215	A	mx.kilocount.com