retrotechnique.org

Observed Jul 27, 2026, 14:33 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.

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Up right now

Secured byLet's Encrypt

IPv6 · tranco

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

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

retrotechnique.org

A / AAAA

145.239.37.1622001:41d0:301::30

2001serves the site

ns13.ovh.netdns13.ovh.net

ovh.netanswers its DNS

mx1.mail.ovh.netmx2.mail.ovh.netmx3.mail.ovh.net

ovh.netreceives its email

TLS

retrotechnique.org

Let's Encryptissued its certificate

DNS Records

A 1

145.239.37.162

AAAA 1

2001:41d0:301::30

MX 3

1mx1.mail.ovh.net
5mx2.mail.ovh.net
100mx3.mail.ovh.net

TXT 3

1|www.retrotechnique.org
v=spf1 include:mx.ovh.com ~all include:message-business.com ~all
v=DMARC1;p=quarantine;pct=100;rua=mailto:abuse@retrotechnique.org

NS 2

ns13.ovh.net
dns13.ovh.net

SOA 1

dns13.ovh.net tech.ovh.net

SRV 3

mailconfig.ovh.net:443 p0
ssl0.ovh.net:993 p0
ssl0.ovh.net:465 p0

TLS Certificates (2)

Common Name	Issuer	Expires
`retrotechnique.org`	C=US, O=Let's Encrypt, CN=E8	Wed, 19 Aug 2026 00:36:14 +0000
`E8`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Fri, 12 Mar 2027 23:59:59 +0000

Subdomains (0)

None observed.

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 retrotechnique.org. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_fe875e4940af8189
Output Hash: 9a650a0b2a277efab15119322fde6eacacde7dc249dd56c38474138346e6b50b
Signature: ed25519:e71fc4b8176f164f3aca9f2fcd2f36d6f1724052277bd295c91f2a47d13e723e2a9d8ee2ea6f295a87144307d8919b237cefb656f357244cda7273b60f3a8a0c
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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