Robtex

Up: 210.211.20.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 210.211.20.0/24
Down right: 210.211.21.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.211.20.2	PTR	ip-2.gastra.net
210.211.20.154	PTR	kgix-20-154.gastra.net
210.211.20.154	A	spectavia.com
210.211.20.154	A	soeghajayaabadi.com
210.211.20.179	PTR	kgix-20-179.gastra.net
210.211.20.179	A	mail.paccship.co.id
210.211.21.2	PTR	ip-2.gastra.net
210.211.21.90	PTR	90.210.s2.gastra.net
210.211.21.90	A	wisantra.com
210.211.21.90	A	mail.ewayscorp.com
210.211.21.92	A	ns4.gastra.net