astro4edu.org

Observed Jul 23, 2026, 04:20 UTC (2d 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

Secured byHellenic Academic and Research Institutions CA

Also usesGoogle Search Console

2 subdomains · tranco

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

INFRASTRUCTURE MAPwhat astro4edu.org actually stands on - every host below is a signed observation

astro4edu.org

A / AAAA

149.217.71.11

unattributedserves the site

dns-3.dfn.dedns1.mpia-hd.mpg.dedns-1.dfn.de

dfn.de + mpg.deanswers its DNS

c1234.mx.srv.dfn.deb1234.mx.srv.dfn.dea1234.mx.srv.dfn.de

dfn.dereceives its email

TLS

astro4edu.org

Hellenic Academic and Research Institutions CAissued its certificate

DNS Records

A 1

149.217.71.11

MX 3

10c1234.mx.srv.dfn.de
10b1234.mx.srv.dfn.de
10a1234.mx.srv.dfn.de

TXT 4

v=spf1 ip4:149.217.71.6 ip4:149.217.71.135 ip4:149.217.70.16 include:spfhard.crsend.com -all
google-site-verification=GOqqMxX108017BDjoXsjkm0oKdyqDwCtqK33Wt3uPzc
HARICA-wreqgszHg32pyhDcM8V
v=DMARC1; p=none; sp=quarantine; rua=mailto:postmaster@mpia-hd.mpg.de;

NS 3

dns-3.dfn.de
dns1.mpia-hd.mpg.de
dns-1.dfn.de

SOA 1

dns1.mpia-hd.mpg.de postmaster.astro4edu.org

TLS Certificates (3)

Common Name	Issuer	Expires
`astro4edu.org`	C=GR, O=Hellenic Academic and Research Institutions CA, CN=GEANT TLS RSA 1	Sat, 06 Mar 2027 17:25:10 +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
`HARICA TLS RSA Root CA 2021`	C=GR, L=Athens, O=Hellenic Academic and Research Institutions Cert. Authority, CN=Hellenic Academic and Research Institutions RootCA 2015	Fri, 31 Aug 2029 07:41:54 +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 astro4edu.org. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/astro4edu.org">
  <img src="https://domaindrift.io/badge/astro4edu.org.svg"
       width="300" height="64" alt="DomainDrift signed observations for astro4edu.org">
</a>

Ed25519 Receipt

Receipt ID: rcpt_44753a076f4b0352
Output Hash: 86a6b5332ce69b692f379408ace49993d63fe52b3288e12233960288da8a93a0
Signature: ed25519:83fde6b9c7d2b527bb75a9ac189311b7e17a2d2a8e39c6d6c951f3ca4428a7688d6ec5b1bef97f4eeb76db2bbc908469debf7596bdb96f6d5d66b54fe0f6510d
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/astro4edu.org