saulsteinbergfoundation.org
Observed Aug 16, 2026, 06:24 UTC (11h 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 onCloudflare
CloudflareEmail byGoogle (SPF sender)
Google (SPF sender)Secured byLet's Encrypt
Let's EncryptRegistered withRegister.com - Network Solutions, LLC
Also usesGoogle Search Console
Google Search Consolemajestic
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat saulsteinbergfoundation.org actually stands on - every host below is a signed observation
saulsteinbergfoundation.org
A / AAAA
141.193.213.10141.193.213.11
Cloudflareserves the site
NS
gina.ns.cloudflare.comray.ns.cloudflare.com
cloudflare.comanswers its DNS
MX
mx1c38.carrierzone.commx2c38.carrierzone.commx3c38.carrierzone.commx4c38.carrierzone.com
Google (SPF sender)receives its email
TLS
saulsteinbergfoundation.org
Let's Encryptissued its certificate
DNS Records
A 2
141.193.213.10141.193.213.11
MX 4
10mx1c38.carrierzone.com100mx2c38.carrierzone.com110mx3c38.carrierzone.com120mx4c38.carrierzone.com
TXT 3
google-site-verification=961Yc1lCgcb7KCShguS2RFglxSaduCUII6kJppGwgV0google-site-verification=cP0_eiM050uasijHY91MyD7YrzPrKsriMVcZf1fw4lgv=spf1 a mx include:spfc38.carrierzone.com include:verticalresponse.com include:_spf.google.com ~all
NS 2
gina.ns.cloudflare.comray.ns.cloudflare.com
SOA 1
gina.ns.cloudflare.com dns.cloudflare.com
DMARC_RECORDS 1
v=DMARC1; p=quarantine; rua=mailto:dmarc.wai@condensed.io,mailto:dmarc.brent@condensed.io; ruf=mailto:dmarc.wai@condensed.io,mailto:dmarc.brent@condensed.io; adkim=r; aspf=r;
TLS Certificates (4)
| Common Name | Issuer | Expires |
|---|---|---|
saulsteinbergfoundation.org |
C=US, O=Let's Encrypt, CN=YE1 | Wed, 07 Oct 2026 08:48:28 +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 (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; the only network request the check makes is for the published public keys.
Verify this receiptEd25519 Receipt
- Receipt ID
rcpt_e8dbe64846f34a2b- Output Hash
1e529606d5cba513cf4963118a6ca9d37500c91b0adf78c56cf6f22ad3d69336- Signature
ed25519:3511979640a5d0d240540c93adbd31c83c396a42875a81a88eefe98d944c7190d4e9e000916ea83da154040074cf0cf04f6cccdae37d676079b0cade95da9805- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast