Robtex

Up: 171.255.196.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 171.255.196.0/25
Down right: 171.255.196.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
171.255.196.65	PTR	dynamic-ip-adsl.viettel.vn
171.255.196.65	A	cdn.ereka.vn
171.255.196.69	PTR	dynamic-ip-adsl.viettel.vn
171.255.196.69	A	ns1.ereka.vn
171.255.196.70	PTR	dynamic-ip-adsl.viettel.vn
171.255.196.70	A	ns2.ereka.vn
171.255.196.169	A	itrithuc.vn
171.255.196.177	PTR	dynamic-ip-adsl.viettel.vn
171.255.196.177	A	cdn.ereka.vn
171.255.196.180	A	biendaovietnam.org.vn
171.255.196.180	A	logging.api.ereka.vn
171.255.196.180	A	ssr.ereka.vn
171.255.196.183	A	v2.api.ereka.vn
171.255.196.183	A	api.chat.ereka.vn
171.255.196.183	A	platform.chat.ereka.vn
171.255.196.217	A	mail.viettel.io