`.vn` (VNNIC) had some mishap earlier today with their DNSSEC. Good that they've recovered so quickly.
erpfit.com/en/blog/vn-dnssec-outage…
erpfit.com
The .vn DNSSEC outage of 22 October 2026: why it looked like 'only my site' was down — ERPFit
The vn. zone was re-signed without the KSK the root points at. Validating resolvers SERVFAIL .vn names while uptime monitors stay green. How to check it yourself, and what a domain holder can do.