Robtex

Up: 210.211.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 210.211.16.0/22
Down right: 210.211.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.211.16.2	PTR	ip-2.gastra.net
210.211.16.9	PTR	ip-9.gastra.net
210.211.16.26	PTR	ip-26.gastra.net
210.211.16.107	PTR	mail.paccship.co.id
210.211.16.123	A	mx3.summarecon.com
210.211.16.162	A	njis.or.id
210.211.16.162	A	www.njis.or.id
210.211.16.219	A	sausalitoresto.com
210.211.16.219	A	crabhaus.com
210.211.16.220	A	verrysoon.com
210.211.16.251	A	mail.smii.co.id
210.211.17.2	PTR	ip-2.gastra.net
210.211.17.9	PTR	ip-9.gastra.net
210.211.17.17	PTR	ns1.gastra.net
210.211.17.26	PTR	ip-26.gastra.net
210.211.17.123	PTR	kgix-17-123.gastra.net
210.211.17.123	A	phattrienthuonghieu.com.vn
210.211.17.234	PTR	kgix-17-234.gastra.net
210.211.17.234	A	ns1.rni.co.id
210.211.18.2	PTR	ip-2.gastra.net
210.211.18.9	PTR	ip-9.gastra.net
210.211.18.18	PTR	ip-18.gastra.net
210.211.18.26	PTR	ip-26.gastra.net
210.211.18.108	A	mail.e-samudra.com
210.211.18.124	A	carikdev.com
210.211.18.131	A	seacon-terminal.com
210.211.18.131	A	seacon-services.com
210.211.18.131	A	www.seacon-terminal.com
210.211.18.139	A	mail.rni.co.id
210.211.18.140	A	www.seacon.co.id
210.211.18.140	A	seacon.co.id
210.211.18.141	PTR	mail.pelayaranbintangputih.com
210.211.18.141	A	mail.seacon-services.com
210.211.18.156	A	ns2.rni-group.com
210.211.18.188	A	mail.mbs.web.id
210.211.18.188	A	mail.lspkomputer.id
210.211.18.242	A	profesinews.com
210.211.18.243	A	lsp-abi.org
210.211.18.245	A	ns1.mbs.web.id
210.211.19.2	PTR	ip-2.gastra.net
210.211.19.3	PTR	ip-3.gastra.net
210.211.19.9	PTR	ip-9.gastra.net
210.211.19.19	A+PTR	ns1.gastra.net
210.211.19.19	A	19.211.210.in-addr.arpa
210.211.19.25	PTR	ip-25.gastra.net
210.211.19.26	PTR	ip-26.gastra.net
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
210.211.22.2	PTR	ip-2.gastra.net
210.211.23.1	PTR	ip-1.gastra.net
210.211.23.2	PTR	ip-2.gastra.net