vaucanson.org

Observed Jul 27, 2026, 05:09 UTC (6d 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

Secured byLet's Encrypt

Also usesGoogle Search Console

1 subdomain · domcop

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

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

vaucanson.org

A / AAAA

109.234.166.229

unattributedserves the site

ns1.o2switch.netns2.o2switch.net

o2switch.netanswers its DNS

mail.vaucanson.org

vaucanson.orgreceives its email

TLS

vaucanson.org

Let's Encryptissued its certificate

DNS Records

A 1

109.234.166.229

MX 1

0mail.vaucanson.org

TXT 3

google-site-verification=m8q07XRicEUOnNysG-_b2RouoBsWaEQoV5fzRYKNPEc
v=spf1 ip4:109.234.166.229 +a +mx +include:spf.jabatus.fr ~all
v=DMARC1; p=none;

NS 2

ns1.o2switch.net
ns2.o2switch.net

SOA 1

ns1.o2switch.net sysadmin.o2switch.fr

SRV 1

cpanelemaildiscovery.cpanel.net:443 p0

TLS Certificates (3)

Common Name	Issuer	Expires
`vaucanson.org`	C=US, O=Let's Encrypt, CN=YR2	Fri, 02 Oct 2026 14:21:18 +0000
`YR2`	C=US, O=ISRG, CN=Root YR	Sat, 02 Sep 2028 23:59:59 +0000
`Root YR`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (1)

www.vaucanson.org

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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Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for vaucanson.org. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_e7434e92c6159674
Output Hash: c721e994f46fff3eba9937adcd3c91504af9476bcb2f7a9ec8c211d8bc98197d
Signature: ed25519:cd8a21378e5bc27c49e335efe28ebe7b5818301cc99de00be13dc4cee3b340569622c6319b2eba8dbba122db75c1f5fe4b577ffef329212ef106dd645ed26f0a
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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