SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
dina-4.cat
SSL/TLS Certificate
SSL/TLS Certificate for dina-4.cat
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- dina-4.cat
- Valid from
- May 28, 2026
- Valid until
- Aug 26, 2026 (30 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 058F4C037B536E510E50E8C930D3AA208F3F
- SHA-256 fingerprint
- 2B:D5:32:DF:69:13:9D:C0:EE:E4:FF:A9:2F:16:92:9B:8B:A9:68:4A:DE:DB:C7:1F:00:D8:CB:04:44:2C:CB:E7
- Chain
- R12 → 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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This is today's certificate. Turn on monitoring and we'll watch dina-4.cat continuously, notifying you the moment anything moves across all three signals:
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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