drg.ac.uk

Observed Jul 25, 2026, 20:56 UTC (6d 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.

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Up right now

Email byGoogle Workspace

Secured byLet's Encrypt

Also usesGoogle Search Console

1 subdomain · tranco

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

INFRASTRUCTURE MAPwhat drg.ac.uk actually stands on - every host below is a signed observation

drg.ac.uk

A / AAAA

138.68.169.221

unattributedserves the site

acheron.shef.ac.ukhippo.shef.ac.uk

shef.ac.ukanswers its DNS

aspmx2.googlemail.comaspmx.l.google.comaspmx3.googlemail.comalt1.aspmx.l.google.com+1 more

Google Workspacereceives its email

TLS

drg.ac.uk

Let's Encryptissued its certificate

DNS Records

A 1

138.68.169.221

MX 5

30aspmx2.googlemail.com
10aspmx.l.google.com
30aspmx3.googlemail.com
20alt1.aspmx.l.google.com
20alt2.aspmx.l.google.com

TXT 1

google-site-verification=AZUiuA04aK4vhDMBNhAnedykWSzd03tZj3psQ0t2TOE

NS 2

acheron.shef.ac.uk
hippo.shef.ac.uk

SOA 1

acheron.shef.ac.uk hostmaster.shef.ac.uk

TLS Certificates (4)

Common Name	Issuer	Expires
`drg.ac.uk`	C=US, O=Let's Encrypt, CN=YE1	Thu, 03 Sep 2026 22:49:04 +0000
`YE1`	C=US, O=ISRG, CN=Root YE	Sat, 02 Sep 2028 23:59:59 +0000
`Root YE`	C=US, O=Internet Security Research Group, CN=ISRG Root X2	Thu, 02 Sep 2032 23:59:59 +0000
`ISRG Root X2`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (1)

www.drg.ac.uk

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.

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

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

Ed25519 Receipt

Receipt ID: rcpt_1b2fca147bcf54e4
Output Hash: 499f2ff50880357dc0d316132ce396dcb20a6d78c3e31a530e575e326b8d8a22
Signature: ed25519:1a7f40f6cf808b20ab73b0dd39a0d2d5c5684c8560996fdcf1ac7c2858313da3a4da7cfd22424939b4db7101a24ad92103a7e1768d5e9096817252e629a4f804
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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