SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
simi-as.dk
SSL/TLS Certificate
SSL/TLS Certificate for simi-as.dk
Hostname mismatch- Issued by (CA)
- GlobalSign nv-sa
- Subject
- *.simi.dk
- Valid from
- Apr 7, 2026
- Valid until
- Oct 23, 2026 (60 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 7396089E4F7DBF847FD01846
- SHA-256 fingerprint
- 2C:EC:41:81:C7:89:D0:53:6D:5B:B0:81:91:2D:14:34:F2:31:00:8E:FF:B9:D4:20:49:BF:62:1C:95:B6:F2:5C
- Chain
- GlobalSign GCC R6 AlphaSSL CA 2025 → GlobalSign
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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