signal.org

Observed Jul 21, 2026, 19:09 UTC (1d 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

Runs onCloudflare

Email byGoogle Workspace

Secured byGoogle Trust Services

Registered withMarkMonitor Inc.

Also usesGoogle Search ConsoleAtlassian

IPv6 · security

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

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

signal.org

A / AAAA

104.18.10.47104.18.11.472606:4700::6812:a2f2606:4700::6812:b2f

Cloudflareserves the site

zita.ns.cloudflare.comcasey.ns.cloudflare.com

cloudflare.comanswers its DNS

aspmx.l.google.comalt1.aspmx.l.google.comalt2.aspmx.l.google.comaspmx2.googlemail.com+1 more

Google Workspacereceives its email

TLS

signal.org

Google Trust Servicesissued its certificate

DNS Records

A 2

104.18.10.47
104.18.11.47

AAAA 2

2606:4700::6812:a2f
2606:4700::6812:b2f

MX 5

1aspmx.l.google.com
5alt1.aspmx.l.google.com
5alt2.aspmx.l.google.com
10aspmx2.googlemail.com
10aspmx3.googlemail.com

TXT 7

MS=ms64370964
v=spf1 include:_spf.google.com ~all
anthropic-domain-verification-w1sp3g=yHrFLemYCHqI7Xa0hqH80GBFR
google-site-verification=E9NOI9LjgLb5GEyCWbHTr8yumWFOdOuCtFkCeQ_GhVM
atlassian-domain-verification=E0za3YlmgyiE3wck1TFwdW1j0dbRUDsSNh9VBjrOx4yMWdOdauAaLczjR2c/FFmr
v=DMARC1; p=quarantine; pct=100; rua=mailto:dmarc@signal.org
v=STSv1;id=20260327162351;

NS 2

zita.ns.cloudflare.com
casey.ns.cloudflare.com

SOA 1

casey.ns.cloudflare.com dns.cloudflare.com

TLS Certificates (3)

Common Name	Issuer	Expires
`signal.org`	C=US, O=Google Trust Services, CN=WE1	Mon, 05 Oct 2026 17:16:42 +0000
`WE1`	C=US, O=Google Trust Services LLC, CN=GTS Root R4	Tue, 20 Feb 2029 14:00:00 +0000
`GTS Root R4`	C=BE, O=GlobalSign nv-sa, 2.5.4.11=Root CA, CN=GlobalSign Root CA	Fri, 28 Jan 2028 00:00:42 +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 signal.org. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_dab6c9032db10971
Output Hash: 13ce13aea5c96119a6477707bfbf12fc8c76abaf97cbf73ab34eb7d0ceaf273c
Signature: ed25519:b56b66f6ec661c956a2069993660f0325573dd7267e19d6ea4829e40580de07ee97b9132c6c7e4d28afd1d6b1b7f63ad528ab0512d978f72a8ba3643eb53d505
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

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