SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
u-turn.io
SSL/TLS Certificate
SSL/TLS Certificate for u-turn.io
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- u-turn.io
- Valid from
- Aug 25, 2026
- Valid until
- Nov 23, 2026 (55 days remaining)
- Public key
- EC 256-bit
- Serial
- 0559DB9F1E105AC94AD855BB9AC2BA2AADDF
- SHA-256 fingerprint
- A2:46:96:E6:49:B7:40:0F:CA:61:F0:29:14:3F:1F:BE:AE:E7:06:59:62:22:D8:8D:2F:01:4D:A6:89:84:A1:93
- Chain
- YE1 → Root YE → ISRG Root X2 → 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 19, 2026.
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Uptime
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DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME 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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