Robtex

Up: 203.148.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.148.216.0/23
Down right: 203.148.218.0/23

IP	Type	Hostname
203.148.216.116	PTR	static-ip.anet.net.th
203.148.216.148	PTR	static-ip.anet.net.th
203.148.218.104	PTR	static-ip.anet.net.th
203.148.219.20	PTR	mail.ckshoes.co.th
203.148.219.24	PTR	clarks.ckshoes.co.th
203.148.219.64	PTR	static-ip.anet.net.th