usfca.org

Observed Jul 27, 2026, 18:26 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.

Verify this receipt yourself + Watch this domain

Up right now

Secured byLet's Encrypt

domcop

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

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

usfca.org

A / AAAA

34.174.214.73

unattributedserves the site

ns2.siteground.netns1.siteground.net

siteground.netanswers its DNS

mx10.mailspamprotection.commx20.mailspamprotection.commx30.mailspamprotection.com

mailspamprotection.comreceives its email

TLS

*.usfca.org

Let's Encryptissued its certificate

DNS Records

A 1

34.174.214.73

MX 3

10mx10.mailspamprotection.com
20mx20.mailspamprotection.com
30mx30.mailspamprotection.com

TXT 2

v=spf1 +a +mx +ip4:34.174.228.160 include:usfca.org.spf.auto.dnssmarthost.net ~all
v=DMARC1; p=none; aspf=r; adkim=r;

NS 2

ns2.siteground.net
ns1.siteground.net

SOA 1

ns1.siteground.net admins.siteground.com

TLS Certificates (3)

Common Name	Issuer	Expires
`*.usfca.org`	C=US, O=Let's Encrypt, CN=YR1	Sun, 20 Sep 2026 04:16:35 +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 (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 usfca.org. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_524b91b7f17aa5d0
Output Hash: b77371548efca7a8cf536521ca9a137e35f55a76082ea106b471e68a73f3a083
Signature: ed25519:398d95808e5cb42d64f842477369be56b2088f90c4c53bcc05244bb04782458a87663088e857068673a4e858e33409a0baeee29936a1f6cc077b929b7403f807
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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