usd443.org
Observed Aug 2, 2026, 15:23 UTC (14h 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
Email byProofpoint
Secured byLet's Encrypt
Also usesGoogle Search Console
15 subdomains · domcop
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat usd443.org actually stands on - every host below is a signed observation
usd443.org
A / AAAA
54.221.139.16918.233.124.95
unattributedserves the site
NS
dns105.register.comdns106.register.com
register.comanswers its DNS
MX
mxa-0050d601.gslb.pphosted.commxb-0050d601.gslb.pphosted.com
Proofpointreceives its email
TLS
www.usd443.org
Let's Encryptissued its certificate
DNS Records
A 2
54.221.139.16918.233.124.95
MX 2
10mxa-0050d601.gslb.pphosted.com10mxb-0050d601.gslb.pphosted.com
TXT 3
_asqj1tfx9yfart8lz461ifa2l32vzkrv=spf1 include:_spf.usd443_org._d.easydmarc.pro ~allgoogle-site-verification=scK1UEG2NVW5hHRHAyHfbPYbSU4OAxUw8GhBs5KcUVc
NS 2
dns105.register.comdns106.register.com
SOA 1
DNS105.REGISTER.COM root.REGISTER.COM
DMARC_RECORDS 1
v=DMARC1;p=reject;pct=100;rua=mailto:e014bc6afc@rua.easydmarc.us;ruf=mailto:e014bc6afc@ruf.easydmarc.us;ri=86400;fo=1;
MTA_STS_RECORDS 1
v=STSv1; id=20251111T151555;
TLS Certificates (4)
| Common Name | Issuer | Expires |
|---|---|---|
www.usd443.org |
C=US, O=Let's Encrypt, CN=YE1 | Thu, 03 Sep 2026 18:06:48 +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 (15)
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_3c8bbfa50c94e888- Output Hash
f0be9af57c98351cffe3d917c8b95f09ebfb0119e1f889685b98888ae31894e0- Signature
ed25519:8095c336c2d9e4b2de0c7232f7608fb0add1fe9e9df594bfa086aff8bd844bf932cc9bc809fd54dcf75d5c72171b540fe11d773a8989ffab45ffce30a946210d- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast