fd.io

Observed Jul 17, 2026, 15:03 UTC (1d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Email byAmazon SES

Secured byLet's Encrypt

IPv6 · 1 subdomain · tranco_100k

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

INFRASTRUCTURE MAPwhat fd.io actually stands on - every host below is a signed observation

fd.io

A / AAAA

18.208.88.15798.84.224.1112600:1f18:16e:df01::2582600:1f18:16e:df01::259

2600serves the site

ns1.dnsimple-edge.comns2.dnsimple-edge.netns3.dnsimple-edge.ions4.dnsimple-edge.org

dnsimple-edge.com + dnsimple-edge.net + moreanswers its DNS

mx1.forwardemail.netmx2.forwardemail.net

Amazon SESreceives its email

TLS

fd.io

Let's Encryptissued its certificate

DNS Records

A 2

18.208.88.157
98.84.224.111

AAAA 2

2600:1f18:16e:df01::258
2600:1f18:16e:df01::259

MX 2

10mx1.forwardemail.net
10mx2.forwardemail.net

TXT 2

v=spf1 include:forwardemail.net mx include:aspmx.pardot.com include:mailgun.org include:amazonses.com ~all
forward-email-site-verification=lECr4P38lG

NS 4

ns1.dnsimple-edge.com
ns2.dnsimple-edge.net
ns3.dnsimple-edge.io
ns4.dnsimple-edge.org

SOA 1

ns1.dnsimple-edge.com admin.dnsimple.com

TLS Certificates (4)

Common Name	Issuer	Expires
`fd.io`	C=US, O=Let's Encrypt, CN=YE1	Wed, 16 Sep 2026 11:53:48 +0000
`YE1`	C=US, O=ISRG, CN=Root YE	Sat, 02 Sep 2028 23:59:59 +0000
`Root YE`	C=US, O=Internet Security Research Group, CN=ISRG Root X2	Thu, 02 Sep 2032 23:59:59 +0000
`ISRG Root X2`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (1)

www.fd.io

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 fd.io. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: 7f45b757-f5df-4348-bb48-9699cefa5677
Output Hash: a5ccbc779665f565893d5c3090d143383820a50ff178b6dbcdeadb7cefdfae42
Signature: ed25519:d4b48c611836c6c1c27c735d6e88a923d8795179fdb511e080eaf1260f5a08a346390bc06cd5526965f92e7fdd9ab1bb0f30449cd765af4eda89c47c1c64bc09
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/fd.io