khotruyen.ac
Observed Sep 2, 2026, 21:03 UTC (9h ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.
CloudflareSteady. No change on record for khotruyen.ac in the last day; this reading matches the one before it. The steady record is signed like every other reading. Watch it to catch the next move the moment it lands.
HTTPS probe
A security layer answered instead of the site. That is a working defence doing its job, and we record it as its own state rather than as a failure.
It does NOT mean the site is down or misconfigured. It also does not mean we were treated as hostile - most rules of this kind refuse every non-browser client alike.
- A WAF or bot-management rule refuses non-browser user agents by default.
- Automated traffic from datacenter networks is challenged as a matter of policy.
These are the known causes, not a diagnosis of this domain. We recorded that nothing answered; we did not measure why.
Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".
DNS records 7
TLS certificates 0
None.
Subdomains 1
1 subdomain hostname observed and signed - the list itself is part of the paid record.
Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; the only network request the check makes is for the published public keys.
Verify this receiptEd25519 receiptthe raw cryptographic proof
- Receipt ID
rcpt_5b0a732c46f97b27- Output Hash
159562938d059454c73e57248c6b8b6ad04a8fcab98fe6a19acd839e7d136972- Signature
ed25519:60230ab169ca1549e9eb7c936c12d90f727a754c7a786c77ca06050be5467a2fdd67d785b11740764725f2bb1c61b9bd37b0491fed6b2850f7e6150ccea80705- Public Key
ed25519:7aad40f2d6399c207fe2fc15aade04a78324787a355d36725cc90687f9e10cff- Parent
(genesis)- Plane
- fast