usdf.org

Observed Jul 25, 2026, 03:22 UTC (8d 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

Email byAmazon SES

Secured byDigiCert

1 subdomain · tranco

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

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

usdf.org

A / AAAA

24.142.141.115

unattributedserves the site

ns50.worldnic.comns49.worldnic.com

worldnic.comanswers its DNS

d66665a.ess.barracudanetworks.comd66665b.ess.barracudanetworks.com

Amazon SESreceives its email

TLS

usdf.org

DigiCert Incissued its certificate

DNS Records

A 1

24.142.141.115

MX 2

10d66665a.ess.barracudanetworks.com
20d66665b.ess.barracudanetworks.com

TXT 4

v=spf1 ip4:24.142.141.114 ip4:192.168.1.23 include:spf.protection.outlook.com include:spf.ess.barracudanetworks.com include:amazonses.com -all
bb8cbb15da703e1764e9a71991c7130f
MS=ms27599513
v=DMARC1; p=none; rua=mailto:dmarc@usdf.org;

NS 2

ns50.worldnic.com
ns49.worldnic.com

SOA 1

NS49.WORLDNIC.COM namehost\@WORLDNIC.COM

TLS Certificates (2)

Common Name	Issuer	Expires
`usdf.org`	C=US, O=DigiCert Inc, CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1	Fri, 08 Jan 2027 23:59:59 +0000
`DigiCert Global G2 TLS RSA SHA256 2020 CA1`	C=US, O=DigiCert Inc, 2.5.4.11=www.digicert.com, CN=DigiCert Global Root G2	Sat, 29 Mar 2031 23:59:59 +0000

Subdomains (1)

www.usdf.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.

Verify this receipt

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

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

Ed25519 Receipt

Receipt ID: rcpt_8495dc36076f440f
Output Hash: 56558c4dad3e5489519ca95e04618a5f8673bb2bd89e87b9e5b31c1ac159b162
Signature: ed25519:35094eee8d891e4f0c8bf2c9e1156c282399a01c7f3080b74d56fc56ca356a354cbe8f5c2d24035ee205dcfbb3a3234629c877eb89a4698d1de5d6dfb45fb10c
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

Verify this in your browser

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