ubuntu.com
Observed 2026-07-13T00:04:44.532073715+00:00 (1d ago). Every field below was attested with an Ed25519 signature at scan time.
Up right now
Runs onCanonical Group Limited
Secured byLet's Encrypt
Registered withMarkMonitor Inc.
Also usesGoogle Search Console
IPv6 · 1 subdomain · open_source
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat ubuntu.com actually stands on - every host below is a signed observation
ubuntu.com
A / AAAA
185.125.190.29185.125.190.21185.125.190.202620:2d:4000:1::28+2 more
Canonical Group Limitedserves the site
NS
ns1.canonical.comns2.canonical.comns3.canonical.com
canonical.comanswers its DNS
MX
mx.ubuntu.com
ubuntu.comreceives its email
TLS
ubuntu.com
Let's Encryptissued its certificate
DNS Records
A 3
185.125.190.29185.125.190.21185.125.190.20
AAAA 3
2620:2d:4000:1::282620:2d:4000:1::262620:2d:4000:1::27
MX 1
10mx.ubuntu.com
TXT 4
v=spf1 include:_spf.canonical.com include:spf.forwardemail.net ~allforward-email-site-verification=6IsURgl2t7google-site-verification=8CcvY6fsgRbiFk2nyEaiA9rE-ykXOcWUPjJKlO6P4vkv=DMARC1; p=none; pct=100; rua=mailto:dmarc-rua+ubuntu@admin.canonical.com
NS 3
ns1.canonical.comns2.canonical.comns3.canonical.com
SOA 1
ns1.canonical.com hostmaster.canonical.com
CAA 6
issuewild "digicert.com"issuewild "letsencrypt.org"issue "letsencrypt.org"iodef "mailto:is-admin@canonical.com"issue "letsencrypt.org; accounturi=https://acme-v01.api.letsencrypt.org/acme/reg/32541290"issue "digicert.com"
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
ubuntu.com |
C=US, O=Let's Encrypt, CN=YR1 | Wed, 30 Sep 2026 04:13:35 +0000 |
YR1 |
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)
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 receiptPut the receipt on your own site. A live badge showing what DomainDrift observes and signs for ubuntu.com. It updates itself. It attests a signed observation - not that the site is safe.
<a href="https://domaindrift.io/t/ubuntu.com">
<img src="https://domaindrift.io/badge/ubuntu.com.svg"
width="300" height="64" alt="DomainDrift signed observations for ubuntu.com">
</a>
Ed25519 Receipt
- Receipt ID
0159036d-cd45-429a-927d-0274100f25d1- Output Hash
4469a63ebfea9d99382fd97eff692794b087d7dd5c34fc0d3ee084be529dc010- Signature
ed25519:acde0775e9d54ecf11a3cc67883f7c4809dc3e698f4dfbcbebad715ce277e6ba1b5ab69b1ce579561b51d195e0ef1cb35119013210e1aed837aeabf538a42b0e- Public Key
ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8- Parent
(genesis)- Plane
- fast