surfnet.nl

Observed Jul 18, 2026, 13:01 UTC (1d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onSURF B.V

Email byMicrosoft 365

Secured byHellenic Academic and Research Institutions CA

Registered withSURF B.V.

Also usesZoom

IPv6 · 1 subdomain · tranco_20k

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

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

surfnet.nl

A / AAAA

145.100.190.243192.87.108.152001:610:188:410:145:100:190:2432001:610:508:108:192:87:108:15

SURF B.Vserves the site

ns0.ja.netns1.zurich.surf.netns1.surfnet.nlns2.surfnet.nl+1 more

ja.net + surf.net + moreanswers its DNS

surfnet-nl.mail.protection.outlook.com

Microsoft 365receives its email

TLS

surfnet.nl

Hellenic Academic and Research Institutions CAissued its certificate

DNS Records

A 2

145.100.190.243
192.87.108.15

AAAA 2

2001:610:188:410:145:100:190:243
2001:610:508:108:192:87:108:15

MX 1

10surfnet-nl.mail.protection.outlook.com

TXT 8

SURF=edMG0a7sHRnoQKeT
HARICA-lAIPumlIBfavcyQK7e1
ZOOM_verify_Bwct3YXYSYu6foAJyz9Xfg
hibp-verify=dweb_n4l3kcozkdid6tw7vbppwp9y
kGKTLBSGkl3tot+T6ZqrHeaJuIbCAQYKyZusdcFZTiXgBzxlV31qUtWQnRGnK14R5j+zadvC7VTJz8LiKasdpg==
adobe-idp-site-verification=bb247cf6e0162a264df1886109d59464c0de78dd3f1e04091bca1c4bf93d10cd
v=spf1 include:spf.protection.outlook.com ip4:192.87.108.0/22 ip4:91.208.87.45 ip4:145.100.185.144/28 ip4:145.100.182.69 ip4:145.101.113.5 ip4:145.100.178.115 ip4:145.100.178.114 ip6:2001:610:508::/48 ip6:2001:610:188::/48 ip6:2001:610:428::/48 ip4:145.97.20.187 ip4:192.87.66.87 ip4:145.101.112.0/24 ip4:145.0.7.50 ip4:194.171.167.0/24 ip6:2001:610:1:4000::/52 include:spfinc.prolocation.net include:soverin.net -all
v=DMARC1; p=quarantine; rua=mailto:di6leuvu@ag.eu.dmarcadvisor.com;

NS 5

ns0.ja.net
ns1.zurich.surf.net
ns1.surfnet.nl
ns2.surfnet.nl
ns3.surfnet.nl

SOA 1

ns1.surfnet.nl dns-beheer.surf.nl

CAA 2

issue "harica.gr"
issue "sectigo.com"

TLS Certificates (3)

Common Name	Issuer	Expires
`surfnet.nl`	C=GR, O=Hellenic Academic and Research Institutions CA, CN=GEANT TLS ECC 1	Sun, 31 Jan 2027 13:11:30 +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.surfnet.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 surfnet.nl. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: b56956c4-1d93-45d3-9389-6cc54ed10740
Output Hash: e40f3a33ec400537b48e7f2bae28f61a1e021ca93ef30b06766af7343dec4d83
Signature: ed25519:8a4ac3ee220834a4a4c3a2cd0a8f94c0b4098ecd483f29874a5d5ec03c28db373025df2a2747259b2f9d5b284793538d6227d9520c75d8ad12c89c3e9ed7060c
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

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