urc.ac.ru
Observed Jul 26, 2026, 08:55 UTC (8d 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
majestic
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat urc.ac.ru actually stands on - every host below is a signed observation
urc.ac.ru
A / AAAA
37.75.250.13
unattributedserves the site
NS
adns02.susu.ac.ruadns01.susu.ac.ru
ac.ruanswers its DNS
MX
mail-smtp02.urc.ac.rumail-smtp01.urc.ac.ru
ac.rureceives its email
TLS
urc.ac.ru
Let's Encryptissued its certificate
DNS Records
A 1
37.75.250.13
MX 2
10mail-smtp02.urc.ac.ru10mail-smtp01.urc.ac.ru
TXT 3
v=spf1 +mx +a:mail-smtp01.urc.ac.ru +a:mail-smtp02.urc.ac.ru +a:mail-smtp03.urc.ac.ru -allv=DMARC1; p=reject; rua=mailto:dmarcreports@urc.ac.ru; adkim=s; aspf=sv=DMARC1; p=quarantine; rua=mailto:dmarcreports@urc.ac.ru; adkim=s; aspf=s
NS 2
adns02.susu.ac.ruadns01.susu.ac.ru
SOA 1
adnsdb.susu.ac.ru dnsmaster.susu.ac.ru
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
urc.ac.ru |
C=US, O=Let's Encrypt, CN=YR1 | Sun, 30 Aug 2026 18:32:38 +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 (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; nothing leaves your machine.
Verify this receiptEd25519 Receipt
- Receipt ID
rcpt_d2598430236e3045- Output Hash
83e4fc85acf3a97e307ad204f83115d4dea55792865f17ef71ccce16b52c6e80- Signature
ed25519:f11cb33659bb3140373ff88e2be871db7ce14bdf64204ccf92d2b5a8ed5fb3c3b9b5981b96c52877343ba685d2ace51534bef397ee457b1653c4182fc81bc103- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast