Robtex

Up: 203.198.156.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 203.198.158.0/24
Down right: 203.198.159.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.198.158.1	A+PTR	001.158.198.203.static.netvigator.com
203.198.158.2	A+PTR	002.158.198.203.static.netvigator.com
203.198.158.3	A+PTR	003.158.198.203.static.netvigator.com
203.198.158.4	A+PTR	004.158.198.203.static.netvigator.com
203.198.158.5	A+PTR	005.158.198.203.static.netvigator.com
203.198.158.10	PTR	010.158.198.203.static.netvigator.com
203.198.158.11	A+PTR	011.158.198.203.static.netvigator.com
203.198.158.12	A+PTR	012.158.198.203.static.netvigator.com
203.198.158.13	A+PTR	013.158.198.203.static.netvigator.com
203.198.158.14	A+PTR	014.158.198.203.static.netvigator.com
203.198.158.33	PTR	mail.boto.com.hk
203.198.158.66	PTR	066.158.198.203.static.netvigator.com
203.198.158.66	A	ipvpn085066.netvigator.com
203.198.158.66	A	mail.hkwebbank.com
203.198.158.129	PTR	129.158.198.203.static.netvigator.com
203.198.158.129	A	mail2.wtpl.com.hk
203.198.158.129	A	mail2.wtil.com.hk
203.198.158.132	PTR	132.158.198.203.static.netvigator.com
203.198.158.141	PTR	141.158.198.203.static.netvigator.com
203.198.158.147	A+PTR	147.158.198.203.static.netvigator.com
203.198.158.206	A+PTR	206.158.198.203.static.netvigator.com
203.198.158.206	A	terenceli.com
203.198.158.206	A	smtp.terenceli.com
203.198.158.222	A+PTR	222.158.198.203.static.netvigator.com
203.198.159.1	A+PTR	001.159.198.203.static.netvigator.com
203.198.159.2	A+PTR	002.159.198.203.static.netvigator.com
203.198.159.3	A+PTR	003.159.198.203.static.netvigator.com
203.198.159.4	A+PTR	004.159.198.203.static.netvigator.com
203.198.159.5	A+PTR	005.159.198.203.static.netvigator.com
203.198.159.11	A+PTR	011.159.198.203.static.netvigator.com
203.198.159.12	A+PTR	012.159.198.203.static.netvigator.com
203.198.159.13	A+PTR	013.159.198.203.static.netvigator.com
203.198.159.53	A+PTR	mail.stratech.com.hk
203.198.159.90	PTR	090.159.198.203.static.netvigator.com
203.198.159.96	PTR	096.159.198.203.static.netvigator.com
203.198.159.97	A+PTR	097.159.198.203.static.netvigator.com
203.198.159.97	A	nelson-wheeler.rsmnelsonwheeler.com
203.198.159.98	A+PTR	098.159.198.203.static.netvigator.com
203.198.159.98	A	mail.alphalinkgc.com
203.198.159.98	A	mail.rsmhk.com
203.198.159.162	A+PTR	162.159.198.203.static.netvigator.com
203.198.159.162	A	ccccpa.com.hk
203.198.159.163	PTR	mail.ccccpa.com.hk
203.198.159.191	A	191.159.198.203.static.netvigator.com
203.198.159.244	PTR	244.159.198.203.static.netvigator.com
203.198.159.244	A	ipvpn086244.netvigator.com