krakow.pl
Observed Jul 22, 2026, 00:01 UTC (23h 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
Runs onAcademic Computer Centre CYFRONET AGH
Secured byLet's Encrypt
Registered withAkademickie Centrum Komputerowe CYFRONET AGH
tranco_10k
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat krakow.pl actually stands on - every host below is a signed observation
krakow.pl
A / AAAA
149.156.2.195
Academic Computer Centre CYFRONET AGHserves the site
NS
nms.cyf-kr.edu.plinfo.cyf-kr.edu.plbilbo.nask.org.pldns.fuw.edu.pl
edu.pl + org.planswers its DNS
MX
pocztapro.cyfronet.pl
cyfronet.plreceives its email
TLS
*.krakow.pl
Let's Encryptissued its certificate
DNS Records
A 1
149.156.2.195
MX 1
4pocztapro.cyfronet.pl
TXT 2
v=spf1 ip4:149.156.2.0/24 mx -allv=DMARC1; p=quarantine; sp=none; rua=mailto:dmarc_report@cyfronet.pl; ruf=mailto:dmarc_reportf@cyfronet.pl;
NS 4
nms.cyf-kr.edu.plinfo.cyf-kr.edu.plbilbo.nask.org.pldns.fuw.edu.pl
SOA 1
nms.cyf-kr.edu.pl hostmaster.cyf-kr.edu.pl
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
*.krakow.pl |
C=US, O=Let's Encrypt, CN=YR2 | Tue, 29 Sep 2026 08:51:15 +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 (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_53e4c88632967ce7- Output Hash
0f693b6509aae9ad182121e000b7b8764b5a7cdf50772b2138bccf918911d025- Signature
ed25519:c957888a2c19756d4c8142807d2526138d7e0031fa876ff824d1f0a76de0018c44e101ca3fe0a9b22fee3132aa9a4d401814d9e514225514fa2a126ca3255e03- Public Key
ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8- Parent
(genesis)- Plane
- fast