ubuntu.com
Observed Jul 18, 2026, 12:01 UTC (2d 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
185.125.190.21185.125.190.29185.125.190.202620:2d:4000:1::26+2 more
Canonical Group Limitedserves the site
NS
ns2.canonical.comns1.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
185.125.190.21185.125.190.29185.125.190.20
AAAA 3
2620:2d:4000:1::262620:2d:4000:1::282620:2d:4000:1::27
MX 1
10mx.ubuntu.com
TXT 4
forward-email-site-verification=6IsURgl2t7v=spf1 include:_spf.canonical.com include:spf.forwardemail.net ~allgoogle-site-verification=8CcvY6fsgRbiFk2nyEaiA9rE-ykXOcWUPjJKlO6P4vkv=DMARC1; p=none; pct=100; rua=mailto:dmarc-rua+ubuntu@admin.canonical.com
NS 3
ns2.canonical.comns1.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
21a56b49-344d-4016-b911-9791a98b45c4- Output Hash
b4c85159ad4c109ca454f76683ca80160d2f1732e81c53896ff02308f764cdc4- Signature
ed25519:cfb4e74cb7838fdbb258e516658684c5f450a6e830cb74f4e840d6668d27b584ac830d5aa864d2b69152dcb70db2d96375715515b85fd223f3e376a6a1589308- Public Key
ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8- Parent
(genesis)- Plane
- fast