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 o-t-s.se
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ots.lxir.se
- Valid from
- Oct 27, 2026
- Valid until
- Jan 25, 2027 (83 days remaining)
- Public key
- RSA 3072-bit
- Serial
- 051CBAFB1CCE201335183810038D4B69085B
- SHA-256 fingerprint
- D6:50:98:3C:96:A6:3B:3A:57:03:46:A4:85:BE:55:23:5A:C3:09:B2:E4:21:11:AC:2C:98:EB:19:F9:9C:7F:CC
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 4, 2026.
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This is today's certificate. Turn on monitoring and we'll watch o-t-s.se continuously, notifying you the moment anything moves across all three signals:
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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