SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
cologne-gmbh.com
SSL/TLS Certificate
SSL/TLS Certificate for cologne-gmbh.com
Valid- Issued by (CA)
- Actalis S.p.A.
- Subject
- *.cologne-gmbh.com
- Valid from
- Sep 14, 2026
- Valid until
- Apr 1, 2027 (195 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 4EAFB1914D5B68B45B00BB8DF6EFFF3B
- SHA-256 fingerprint
- FF:12:34:56:F0:15:76:F6:65:F3:E7:47:BD:E2:0C:D6:F2:6E:88:79:9B:8A:D1:FF:6A:57:A3:DF:7E:32:20:0F
- Chain
- Actalis Domain Validated TLS Server RSA CA 2025 → Actalis TLS Server RSA Root CA 2025 → Actalis Authentication Root 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
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
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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