s2dsys.com
Observed Aug 16, 2026, 07:33 UTC (7h 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
Secured byLet's Encrypt
Let's Encrypt2 subdomains · domcop
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat s2dsys.com actually stands on - every host below is a signed observation
s2dsys.com
A / AAAA
108.167.181.192
unattributedserves the site
NS
hadlee.ns.cloudflare.comreese.ns.cloudflare.com
cloudflare.comanswers its DNS
MX
mail.s2dsys.com
s2dsys.comreceives its email
TLS
mail.s2dsys.com
Let's Encryptissued its certificate
DNS Records
A 1
108.167.181.192
MX 1
0mail.s2dsys.com
TXT 2
v=spf1 ip4:108.167.189.22 include:s2dsys.com -allzone-ownership-verification-8b53d992ebf094170835eef0c0aa80e9f8274e51df6d9346a2f2b0f7c363828a
NS 2
hadlee.ns.cloudflare.comreese.ns.cloudflare.com
SOA 1
hadlee.ns.cloudflare.com dns.cloudflare.com
DMARC_RECORDS 1
v=DMARC1; p=quarantine; rua=mailto:c87a0c18437044299c0c2cb7afaf2238@dmarc-reports.cloudflare.net
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
mail.s2dsys.com |
C=US, O=Let's Encrypt, CN=YR2 | Sat, 10 Oct 2026 06:00:19 +0000 |
YR2 |
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 (2)
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_a23d967860be4d20- Output Hash
4941519c6ab148370122fbfb8536ea496333c0d12e1bd49bc1435559981a77eb- Signature
ed25519:39febedf9e654f73196899d7e8a4136f1cb12a547abaaea967d4a00aaaf8dd257f1522a08bd6fbd6f100a948f4f967ede1f599f29174219fa1aae185fa707909- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast