SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
1-alternativa.com
SSL/TLS Certificate
SSL/TLS Certificate for 1-alternativa.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- autodiscover.1-alternativa.com
- Valid from
- Nov 2, 2026
- Valid until
- Jan 31, 2027 (78 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0570DFDFA3E991712E3B5D4A96F826BF158F
- SHA-256 fingerprint
- D8:C6:8A:18:10:B8:63:E3:B1:BC:2E:0A:86:5E:51:B6:8B:CF:44:C6:F7:1A:CE:CC:EF:80:9D:6E:11:A4:9B:EA
- 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 Nov 4, 2026.
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Uptime
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DNS changes
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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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