arc.gov
Observed Jul 22, 2026, 10:09 UTC (3d 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
Also usesGoogle Search Console
IPv6 · 1 subdomain · tranco
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat arc.gov actually stands on - every host below is a signed observation
arc.gov
A / AAAA
23.185.0.42620:12a:8001::42620:12a:8000::4
2620serves the site
NS
delilah.ns.cloudflare.comkarl.ns.cloudflare.com
cloudflare.comanswers its DNS
MX
arc-gov.mail.protection.outlook.com
Microsoft 365receives its email
TLS
arc.gov
Let's Encryptissued its certificate
DNS Records
A 1
23.185.0.4
AAAA 2
2620:12a:8001::42620:12a:8000::4
MX 1
0arc-gov.mail.protection.outlook.com
TXT 8
apple-domain-verification=nxE1srjSQ0Bcjtijfeiprepc8a4plrlosa9k59ejtafg4i0pf32s1modrrs7khq7512ggoogle-site-verification=BWNM1d3QhX_5UGwQzZyj7QP44nTw9MmZ9wHdchqGmkUgoogle-site-verification=zoRKSKA1B6RQdE8UQZd4Y0E7ABNqNRfHsZCqS9_TKeUm2v20kzwc86sghxtfcfb4593p9jd9g3hv=spf1 include:spf.protection.outlook.com include:spfa.cpmails.com ~allv=DMARC1; p=reject; rua=mailto:dmarc-notifications@arc.gov,mailto:4e304b7748e646cda74e170969b6b105@dmarc-reports.cloudflare.net;
NS 2
delilah.ns.cloudflare.comkarl.ns.cloudflare.com
SOA 1
delilah.ns.cloudflare.com dns.cloudflare.com
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
arc.gov |
C=US, O=Let's Encrypt, CN=YR1 | Thu, 15 Oct 2026 08:23:34 +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_2461fa1e4d499292- Output Hash
fe36af21505a3b8b7e4cef7bb8ad1b21a134683d10e714cdf2ed801367df8791- Signature
ed25519:4b9e960642d3dc92f04ef32ac517ba9faace449fcf4db5d48b408fbcd122f85162e531019e269b234aa73cef036e5b1d515b9559534b697e7937374e2d8dae02- Public Key
ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8- Parent
(genesis)- Plane
- fast