Robtex

Up: 171.236.0.0/14
Can't show all results, try to descend to a more specific CIDR
Down left: 171.238.0.0/16
Down right: 171.239.0.0/16
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
171.238.8.58	PTR	dynamic-ip-adsl.viettel.vn
171.238.9.62	PTR	dynamic-ip-adsl.viettel.vn
171.238.13.116	PTR	dynamic-ip-adsl.viettel.vn
171.238.39.35	PTR	dynamic-ip-adsl.viettel.vn
171.238.40.19	PTR	dynamic-ip-adsl.viettel.vn
171.238.40.63	PTR	dynamic-ip-adsl.viettel.vn
171.238.61.208	A	sonkovahaiphong.com
171.238.91.224	PTR	dynamic-adsl.viettel.vn
171.238.155.42	A	vnkadsgame.com
171.238.198.189	PTR	dynamic-adsl.viettel.vn
171.238.213.52	PTR	dynamic-ip-adsl.viettel.vn
171.239.15.165	PTR	dynamic-ip-adsl.viettel.vn
171.239.77.10	A	quochungdns.com
171.239.132.214	PTR	dynamic-ip-adsl.viettel.vn
171.239.132.214	A	erictran.xyz
171.239.142.198	PTR	dynamic-ip-adsl.viettel.vn
171.239.142.198	A	surit.kbvision.tv
171.239.169.95	PTR	dynamic-adsl.viettel.vn
171.239.190.177	PTR	dynamic-ip-adsl.viettel.vn
171.239.190.177	A	mail.lienquan-vn.com
171.239.190.177	A	lienquan-vi.com
171.239.191.190	PTR	dynamic-ip-adsl.viettel.vn
171.239.196.153	PTR	dynamic-ip-adsl.viettel.vn
171.239.196.153	A	ns1.binhduong.win
171.239.196.153	A	binhduong.win
171.239.239.73	PTR	dynamic-adsl.viettel.vn
171.239.244.204	PTR	dynamic-ip-adsl.viettel.vn
171.239.244.204	A	mrphuong0101.ddns.net
171.239.249.77	PTR	dynamic-ip-adsl.viettel.vn
171.239.254.202	PTR	dynamic-ip-adsl.viettel.vn