taxfoundation.org
Observed Jul 22, 2026, 00:15 UTC (18h 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.
Up right now
Runs onFastly
Email byMicrosoft 365
Secured byLet's Encrypt
Registered withAmazon Registrar, Inc.
Also usesAtlassianGoogle Search ConsoleHubSpot
IPv6 · 1 subdomain · tranco_20k
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat taxfoundation.org actually stands on - every host below is a signed observation
taxfoundation.org
A / AAAA
23.185.0.32620:12a:8001::32620:12a:8000::3
Fastlyserves the site
NS
ns-1011.awsdns-62.netns-1235.awsdns-26.orgns-139.awsdns-17.comns-1800.awsdns-33.co.uk
awsdns-62.net + awsdns-26.org + moreanswers its DNS
MX
taxfoundation-org.mail.protection.outlook.com
Microsoft 365receives its email
TLS
taxfoundation.org
Let's Encryptissued its certificate
DNS Records
A 1
23.185.0.3
AAAA 2
2620:12a:8001::32620:12a:8000::3
MX 1
0taxfoundation-org.mail.protection.outlook.com
TXT 10
00dj0000001rzlyea2267C363244MS=ms36814630apple-domain-verification=mPbx7o8ujRHkicTiatlassian-domain-verification=ykDElOfDhkD0ZZ+GGs7eC8ZoaZitugLS9Qzo8MI6hG6UJ/v5KRGNnxGP1GErXxzWcanva-site-verification=8AznUPvo56Es8O6TY8JF2wgoogle-site-verification=bN-7qDjNP_IqgiV4HXKgX5rNze_vXtger_0tG4y-k3cinclude:spf-us.emailsignatures365.comv=spf1 a mx ptr include:spf.protection.outlook.com include:spf.dynect.net include:servers.mcsv.net include:20785128.spf02.hubspotemail.net include:_spf.salesforce.com -allv=DMARC1; p=quarantine; pct=100; rua=mailto:dmarc@taxfoundation.org; ruf=mailto:dmarc-failure@taxfoundation.org;
NS 4
ns-1011.awsdns-62.netns-1235.awsdns-26.orgns-139.awsdns-17.comns-1800.awsdns-33.co.uk
SOA 1
ns-1235.awsdns-26.org awsdns-hostmaster.amazon.com
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
taxfoundation.org |
C=US, O=Let's Encrypt, CN=YR1 | Thu, 15 Oct 2026 04:38:17 +0000 |
YR1 |
C=US, O=ISRG, CN=Root YR | Sat, 02 Sep 2028 23:59:59 +0000 |
Root YR |
C=US, O=Internet Security Research Group, CN=ISRG Root X1 | Thu, 02 Sep 2032 23:59:59 +0000 |
Subdomains (1)
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 receiptEd25519 Receipt
- Receipt ID
rcpt_5b9fd3d5f4511669- Output Hash
590417b33fd6422c9706f7851dd4e8c4a683ad5fd273c4ec436900973eb78056- Signature
ed25519:4b0ccca5c7b69086d4f126119ad6b7b9b1d6285c967348963583ab6b7bc3d3f945b27c8c4cecececcb248a0afc981e3d3a7020546a90b0f4e97a826b62ef2b00- Public Key
ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8- Parent
(genesis)- Plane
- fast