zhangyu.dev

Observed Jul 26, 2026, 22:31 UTC (7d 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.

Verify this receipt yourself + Watch this domain

Up right now

Email byMailgun

Secured byLet's Encrypt

domcop

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

INFRASTRUCTURE MAPwhat zhangyu.dev actually stands on - every host below is a signed observation

zhangyu.dev

A / AAAA

76.76.21.21

unattributedserves the site

ns-cloud-d4.googledomains.comns-cloud-d2.googledomains.comns-cloud-d1.googledomains.comns-cloud-d3.googledomains.com

googledomains.comanswers its DNS

mxa.mailgun.orgmxb.mailgun.org

Mailgunreceives its email

TLS

zhangyu.dev

Let's Encryptissued its certificate

DNS Records

A 1

76.76.21.21

MX 2

10mxa.mailgun.org
10mxb.mailgun.org

TXT 1

v=spf1 include:mailgun.org ~all

NS 4

ns-cloud-d4.googledomains.com
ns-cloud-d2.googledomains.com
ns-cloud-d1.googledomains.com
ns-cloud-d3.googledomains.com

SOA 1

ns-cloud-d1.googledomains.com cloud-dns-hostmaster.google.com

TLS Certificates (3)

Common Name	Issuer	Expires
`zhangyu.dev`	C=US, O=Let's Encrypt, CN=YR2	Wed, 23 Sep 2026 06:10:19 +0000
`YR2`	C=US, O=ISRG, CN=Root YR	Sat, 02 Sep 2028 23:59:59 +0000
`Root YR`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +0000

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 zhangyu.dev. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_3d04dd0084bd2bc6
Output Hash: 3ef7c08bfd2c5fb68e39a3060ea060392115ee4b22228ead434e635363664792
Signature: ed25519:45b66151b34fd967405b1fec41eb87c75380150b80641eb8fb53b524f2fa7b003a715bb44a0579d1c691cd5bd2691ab2d7963dd5819ba78c4f28fa0b3e6b2b04
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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Permalink: https://domaindrift.io/t/zhangyu.dev