SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
obsessive.cz
SSL/TLS Certificate
SSL/TLS Certificate for obsessive.cz
Valid- Issued by (CA)
- Asseco Data Systems S.A.
- Subject
- *.obsessive.cz
- Valid from
- Jul 14, 2026
- Valid until
- Jan 29, 2027 (163 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 56787502C37FC52DF43DD6246BB80459
- SHA-256 fingerprint
- 39:E8:48:44:CB:EF:1B:CA:16:69:CB:FF:9E:38:38:90:D3:E6:81:29:B1:D6:47:6B:33:CE:FB:70:4C:B0:9B:8D
- Chain
- Certum DV TLS G2 R39 CA → Certum Trusted Root CA → Certum Trusted Network CA
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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