arcusa.com
Observed Aug 11, 2026, 02:24 UTC (21h 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 byMicrosoft 365
Secured byLet's Encrypt
IPv6 · 3 subdomains · domcop
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat arcusa.com actually stands on - every host below is a signed observation
arcusa.com
A / AAAA
23.185.0.32620:12a:8001::32620:12a:8000::3
2620serves the site
NS
ns55.worldnic.comns56.worldnic.com
worldnic.comanswers its DNS
MX
arcusa-com.mail.protection.outlook.com
Microsoft 365receives its email
TLS
arcusa.com
Let's Encryptissued its certificate
DNS Records
A 1
23.185.0.3
AAAA 2
2620:12a:8001::32620:12a:8000::3
MX 1
0arcusa-com.mail.protection.outlook.com
TXT 2
v=spf1 include:spf.protection.outlook.com -allMS=ms17149699
NS 2
ns55.worldnic.comns56.worldnic.com
SOA 1
NS55.WORLDNIC.com namehost.WORLDNIC.com
DMARC_RECORDS 1
v=DMARC1; p=quarantine; adkim=r; aspf=r; rua=mailto:dmarc@arcusa.com; pct=100
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
arcusa.com |
C=US, O=Let's Encrypt, CN=YR2 | Sun, 08 Nov 2026 01:33:29 +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 (3)
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_bfd3f915e5b75e1b- Output Hash
68891cfbb7df506418d29265a6b1777136da6d271f577faf5a008c4b081decfe- Signature
ed25519:29b7b13a9f405c3e5324923eadc6fe6b2007a22f208b773516e1ddbe388b6d623a237f320f800cf3ae5216911ae38f2a4832ca3904ecac72f7054b371ee2b601- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast