cwi.nl

Observed Jul 27, 2026, 22:08 UTC (5d 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

Runs onCWI-NL

Secured byHellenic Academic and Research Institutions CA

Registered toCentrum Wiskunde & Informatica

Registered withSURF B.V.

Also usesZoom

1 subdomain · tranco_5k

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

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

cwi.nl

A / AAAA

192.16.191.48

CWI-NLserves the site

ns1.cwi.nlns1.zurich.surf.netns2.cwi.nldwalin.nikhef.nl

cwi.nl + surf.net + moreanswers its DNS

mx.soverin.net

soverin.netreceives its email

TLS

cwi.nl

Hellenic Academic and Research Institutions CAissued its certificate

DNS Records

A 1

192.16.191.48

MX 1

10mx.soverin.net

TXT 11

MS=ms63043750
HARICA-SnDN4Irx82qOUXNni8S
Centrum Wiskunde & Informatica
ZOOM_verify_-TwabqfPQI2RrsWzDjTwfQ
ZOOM_verify_QtFtKLPNUTBlqUfH6kXTNZ
apple-domain-verification=vKvt2VfbB2WZUhzQ
Science Park 123, 1098 XG Amsterdam, Netherlands
CWI (Centrum Wiskunde & Informatica)=pnqgTeOiurzbz4yD
adobe-idp-site-verification=a8667c98581a66df82f18dd9b4ec9ad04d2b0214fda298afa04b69ae89b16b4d
v=spf1 ip4:192.16.191.0/27 ip4:192.174.88.179 ip4:192.174.88.180 ip4:13.58.74.171 include:_spf.surfmailfilter.nl include:projects5.greenlightsolutions.nl include:spf.protection.outlook.com ~all

NS 4

ns1.cwi.nl
ns1.zurich.surf.net
ns2.cwi.nl
dwalin.nikhef.nl

SOA 1

ns1.cwi.nl hostmaster.cwi.nl

SRV 1

sip.cwi.nl:5070 p0

TLS Certificates (3)

Common Name	Issuer	Expires
`cwi.nl`	C=GR, O=Hellenic Academic and Research Institutions CA, CN=GEANT TLS ECC 1	Sun, 07 Feb 2027 11:21:22 +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 (1)

www.cwi.nl

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

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

Ed25519 Receipt

Receipt ID: rcpt_7c6d285193c00653
Output Hash: 4d7a1da463a974ab81984c8c9d91f21e032b909f1652cc9eb236909bddd2a391
Signature: ed25519:70037396c9032b117f054d3bbbb65c1390392825b844666700d31fd073507be2a52ece1d38681316f3324a1670c2fe0ad324a6e6c416b8680e285b9b213df809
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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