fsf.org
Observed Jul 18, 2026, 12:01 UTC (2d ago). Every field below was attested with an Ed25519 signature at scan time.
Not responding
Runs onFree Software Foundation
Registered withGandi SAS
IPv6 · open_source
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat fsf.org actually stands on - every host below is a signed observation
fsf.org
A / AAAA
209.51.188.1742001:470:142:4::a
Free Software Foundationserves the site
NS
ns1.gnu.orgns2.gnu.orgns4.gnu.org
gnu.organswers its DNS
MX
mail.fsf.org
fsf.orgreceives its email
DNS Records
A 1
209.51.188.174
AAAA 1
2001:470:142:4::a
MX 1
10mail.fsf.org
TXT 3
libera-asq123sv=spf1 redirect=gnu.orgv=DMARC1; p=none; rua=mailto:dmarc-rua@fsf.org
NS 3
ns1.gnu.orgns2.gnu.orgns4.gnu.org
SOA 1
ns1.gnu.org hostmaster.gnu.org
SRV 2
jabber.fsf.org:5222 p0jabber.fsf.org:5269 p0
CAA 2
issuewild "letsencrypt.org"issue "letsencrypt.org"
TLS Certificates (0)
None.
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 receiptPut the receipt on your own site. A live badge showing what DomainDrift observes and signs for fsf.org. It updates itself. It attests a signed observation - not that the site is safe.
<a href="https://domaindrift.io/t/fsf.org">
<img src="https://domaindrift.io/badge/fsf.org.svg"
width="300" height="64" alt="DomainDrift signed observations for fsf.org">
</a>
Ed25519 Receipt
- Receipt ID
8723aa3e-befd-4d71-8f93-915b736c81d4- Output Hash
3c7c24810fef715f1c0f665ec6b3ed94243963fbc7c39767204df8e3e6edf862- Signature
ed25519:0e62d40fdaaf4a171c394e8d030275a8f16819d3fad246bf84e834dc0828337a934cfa98ebc33d81a4796eb6e02b46f0b4c633af8c0ab150fca625ebe5f46705- Public Key
ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8- Parent
(genesis)- Plane
- fast