SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
mercmag.pl
SSL/TLS Certificate
SSL/TLS Certificate for mercmag.pl
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- mercmag.pl
- Valid from
- May 30, 2026
- Valid until
- Aug 28, 2026 (37 days remaining)
- Public key
- EC 256-bit
- Serial
- 053833C1341A18343D135C9C917F13A4B7D0
- SHA-256 fingerprint
- C1:00:62:61:08:86:62:85:9C:25:FC:3A:15:A8:78:F5:1F:1D:8E:DE:C3:46:61:FE:1D:9D:08:E4:1E:7C:6D:32
- 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.
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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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