sdf.org

Observed 2026-07-14T21:14:29.150Z (2h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Registered withNameCheap, Inc.

Also usesGoogle Search Console

13 subdomains · tranco_40k

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

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

sdf.org

A / AAAA

205.166.94.16

Cloudflareserves the site

ns-b.sdf.orgns-d.sdf.orgns-c.sdf.orgns-a.sdf.org

sdf.organswers its DNS

mx.sdf.org

sdf.orgreceives its email

HTTPS probe

ok Responding normally (2xx) 200 OK

HTTP status200

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time1000 ms

DNS resolutionNOERROR

Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".

DNS Records

A 1

205.166.94.16

MX 1

50mx.sdf.org

TXT 4

google-site-verification=f_IZGvm9STb9qD_OALNWOBBqguBJc0eJXWTvTkKjXSc
v=spf1 ip4:205.166.94.0/24 -all
v=DMARC1;p=quarantine;sp=quarantine;rua=mailto:dmarc@sdf.org
v=DKIM1; (detected)

NS 4

ns-b.sdf.org
ns-d.sdf.org
ns-c.sdf.org
ns-a.sdf.org

SOA 1

sdf.org hostmaster.sdf.org

TLS Certificates (0)

None.

Subdomains (13)

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

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

Ed25519 Receipt

Receipt ID: 3a81ec62-7722-497e-9103-5927ca242c95
Output Hash: 159ea50b3a85b2772f12d38a9bb2cc8f109a5df1194be3ebaa3860b0f206baca
Signature: ed25519:757534d9db15e633326fae7be9bf6a18e4ca265328fb2062c8d2e13dd1a46fb1a7d3dfddbd25c84960246269a59402ced955f6ec3049116b9b87402ce838210e
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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