rug.nl

Observed Jul 18, 2026, 12:23 UTC (2d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onSURF B.V

Email byGoogle Workspace

Secured byHellenic Academic and Research Institutions CA

Registered withRijksuniversiteit Groningen

Also usesGoogle Search Console

IPv6 · 2 subdomains · push_legacy

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

INFRASTRUCTURE MAPwhat rug.nl actually stands on - every host below is a signed observation

rug.nl

A / AAAA

129.125.2.512001:610:1a08:292:129:125:2:51

SURF B.Vserves the site

dns1.rug.nlns2.surfnet.nldns3.rug.nldns2.rug.nl+1 more

rug.nl + surfnet.nlanswers its DNS

ASPMX3.GOOGLEMAIL.COMASPMX2.GOOGLEMAIL.COMASPMX.L.GOOGLE.COMALT1.ASPMX.L.GOOGLE.COM+1 more

Google Workspacereceives its email

TLS

www.rug.nl

Hellenic Academic and Research Institutions CAissued its certificate

DNS Records

A 1

129.125.2.51

AAAA 1

2001:610:1a08:292:129:125:2:51

MX 5

30ASPMX3.GOOGLEMAIL.COM
30ASPMX2.GOOGLEMAIL.COM
10ASPMX.L.GOOGLE.COM
20ALT1.ASPMX.L.GOOGLE.COM
20ALT2.ASPMX.L.GOOGLE.COM

TXT 9

HARICA-iXUSYZelD4KghRtTA8V
University of Groningen
google-site-verification=LzOS5q7nSbDRZFZ0FMFKbWSvsfDE8bL861TAh-czT7k
MS=ms97484282
mistral-domain-verification=139d17efc022c67581effa2fc6e0bb747d0c9456
v=spf1 include:spf1.rug.nl include:spf2.rug.nl include:spf3.rug.nl include:spf4.rug.nl ~all
bw=7iePWW2zaVtqaRhZZjRWUu985gQ1Ia26nUAJ3BDXMYBp
google-site-verification=pMjlXqlOTWrDjxV9AoW_MGyuGOV3lEAsQ7__vv525Ag
v=DMARC1;p=none;pct=100;rua=mailto:rugmail@rug.nl,mailto:c4b0a07195@rua.easydmarc.eu;ruf=mailto:mwbeheer@rug.nl;fo=1

NS 5

dns1.rug.nl
ns2.surfnet.nl
dns3.rug.nl
dns2.rug.nl
ns1.surfnet.nl

SOA 1

ns.rug.nl hostmaster.nic.rug.nl

TLS Certificates (3)

Common Name	Issuer	Expires
`www.rug.nl`	C=GR, O=Hellenic Academic and Research Institutions CA, CN=GEANT TLS ECC 1	Tue, 01 Dec 2026 08:48:18 +0000
`GEANT TLS ECC 1`	C=GR, O=Hellenic Academic and Research Institutions CA, CN=HARICA TLS ECC Root CA 2021	Sat, 31 Dec 2039 11:14:20 +0000
`HARICA TLS ECC Root CA 2021`	C=GR, L=Athens, O=Hellenic Academic and Research Institutions Cert. Authority, CN=Hellenic Academic and Research Institutions ECC RootCA 2015	Fri, 31 Aug 2029 07:44:36 +0000

Subdomains (2)

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 rug.nl. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: d5e73c53-4eca-41d8-84ea-c2f3e091a078
Output Hash: 196f75c0c375ad600e831ff579f6e1645771c62dfe9e89802d919b33f890bc21
Signature: ed25519:a63940f500eede07c2a3c7635c3e44eca5669958467cb083394027b9455da2fd0ac7f666553c32dd6f9bb500f7535dc43b60933adf552e918cc122c6bb5d020d
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

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