Robtex

Up: 121.101.160.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 121.101.168.0/22
Down right: 121.101.172.0/22

IP	Type	Hostname
121.101.168.22	A	ns01.hkma.gov.hk
121.101.168.23	A+PTR	smtp11.hkma.gov.hk
121.101.168.24	A+PTR	smtp01.hkma.gov.hk
121.101.168.34	A+PTR	ns02.hkma.gov.hk
121.101.168.49	A	vdi.hkma.gov.hk
121.101.168.50	A+PTR	vpn.hkma.gov.hk
121.101.168.51	A	ifcvpng01.hkma.gov.hk
121.101.168.61	PTR	smtp03.hkma.gov.hk
121.101.172.20	A+PTR	smtp21.hkma.gov.hk
121.101.172.38	A	kccvpng01.hkma.gov.hk