SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for k-m-t.at
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- k-m-t.at
- Valid from
- Oct 10, 2026
- Valid until
- Jan 8, 2027 (65 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0550DA49ED2F668E8D39FBF1945AF61C32E1
- SHA-256 fingerprint
- 52:3E:F0:D5:A2:15:E8:D2:82:38:61:6D:68:82:5C:F4:F2:B6:1D:51:3D:E9:E4:E3:12:CC:13:F7:06:E4:DD:B2
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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Uptime
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DNS changes
We watch NS, MX, CAA, CNAME, TXT and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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