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zuyd.nl

Observed Aug 2, 2026, 08:56 UTC (14h 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 byMicrosoft 365
Secured byHellenic Academic and Research Institutions CA
Also usesFacebook/MetaGoogle Search Console
1 subdomain · tranco
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat zuyd.nl actually stands on - every host below is a signed observation
zuyd.nl
A / AAAA
85.10.186.178
unattributedserves the site
NS
ns1.zurich.surf.netns1.surfnet.nlns2.surfnet.nlns3.surfnet.nl
surf.net + surfnet.nlanswers its DNS
MX
zuyd-nl.mail.protection.outlook.com
Microsoft 365receives its email
TLS
zuyd.nl
Hellenic Academic and Research Institutions CAissued its certificate

DNS Records

A 1

  • 85.10.186.178

MX 1

  • 0zuyd-nl.mail.protection.outlook.com

TXT 10

  • HARICA-GZAOelvsgSl8ai3Zy6D
  • HARICA-hS4Hr7dyIxTtmBlUTX6
  • apple-domain-verification=rJcPEd6ynMKFwDiL
  • apple-domain-verification=xa5EMLxwFdbieZqo
  • jamf-site-verification=bQ6Q_HC_cvJ1vgP85HPZdQ
  • barco-verification=7fd22ac8-7122-53be-872f-a2292f03dada
  • facebook-domain-verification=swzkx6qqns16862q98fbnpe3outz0w
  • google-site-verification=tkeBG_PWXJ6158JmeX5Xt5zy1zd_JpZdWAu4ID0bK_Q
  • _elastic_domain_challenge=291b5e71d22ba5e0b133792cdecc0d06823bb0bef4d3a18e6677bce400ea1d91
  • v=spf1 a mx ip4:78.46.94.98 ip4:5.79.89.162 ip4:145.91.28.161 ip4:145.91.28.162 ip4:145.91.28.168 ip4:145.91.28.169 include:spf1.zuyd.nl include:spf.protection.outlook.com ~all

NS 4

  • ns1.zurich.surf.net
  • ns1.surfnet.nl
  • ns2.surfnet.nl
  • ns3.surfnet.nl

SOA 1

  • ns1.surfnet.nl dns-beheer.surf.nl

DMARC_RECORDS 1

  • v=DMARC1; p=quarantine; rua=mailto:8l6wxvlz@ag.eu.dmarcian.com;

TLS Certificates (2)

Common NameIssuerExpires
zuyd.nl C=GR, O=Hellenic Academic and Research Institutions CA, CN=GEANT TLS RSA 1 Tue, 01 Dec 2026 13:31:31 +0000
GEANT TLS RSA 1 C=GR, O=Hellenic Academic and Research Institutions CA, CN=HARICA TLS RSA Root CA 2021 Sat, 31 Dec 2039 11:14:59 +0000

Subdomains (1)

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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Ed25519 Receipt

Receipt ID
rcpt_086952b94e08e31e
Output Hash
05cd152a8489c173ad8b0d10265d5b7ccff3908e3ec91b1ac574658fc8132464
Signature
ed25519:ca2fc81320f1ec36208bf00ae55f994d6e8f69284c0d0c8b428592f4777010f12a4d6d9db6f94f010ac7e8ec06da168b900b07be0320c7bcf3599a720c2fb60a
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
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