u4a.cn

Observed Jul 18, 2026, 13:04 UTC (2d ago). Every field below was attested with an Ed25519 signature at scan time.

Not responding

Signed observation on record.

tranco_20k

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat u4a.cn actually stands on - every host below is a signed observation

u4a.cn

vip4.alidns.comvip3.alidns.com

alidns.comanswers its DNS

mail.u4a.cn

u4a.cnreceives its email

DNS Records

MX 1

1mail.u4a.cn

NS 2

vip4.alidns.com
vip3.alidns.com

SOA 1

vip3.alidns.com hostmaster.hichina.com

TLS Certificates (0)

None.

Subdomains (0)

None observed.

The proof

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; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for u4a.cn. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/u4a.cn">
  <img src="https://domaindrift.io/badge/u4a.cn.svg"
       width="300" height="64" alt="DomainDrift signed observations for u4a.cn">
</a>

Ed25519 Receipt

Receipt ID: aad2e008-dd36-44e5-aecd-9a28f9aa5976
Output Hash: 5fcec32c6b6d93acf7b9a21cad130153a71077317b4cd4646c40034845a3079a
Signature: ed25519:3634763cf5316ab7432c4493a82305eddde91e2ebfdf4e118a538ad30aacd3da96bcdc84c907eb3c6d6b05f80af9fa9959c484517811c7a50b409666de2bde0a
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/u4a.cn