SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sasin.com.pl
SSL/TLS Certificate
SSL/TLS Certificate for sasin.com.pl
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- autodiscover.sasin.com.pl
- Valid from
- Sep 6, 2026
- Valid until
- Dec 5, 2026 (65 days remaining)
- Public key
- EC 256-bit
- Serial
- 0530BBA603A7110AA64B7D8769EB4200F474
- SHA-256 fingerprint
- 0A:36:A4:84:4A:27:66:C3:E0:60:B2:98:2E:1F:B0:E3:F4:8F:5C:7E:0F:D9:BA:B0:8C:3E:C3:F8:E3:FD:91:52
- 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 30, 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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