SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
akt-online.nl
SSL/TLS Certificate
SSL/TLS Certificate for akt-online.nl
Valid- Issued by (CA)
- Hellenic Academic and Research Institutions CA
- Subject
- akt-online.nl
- Valid from
- Oct 6, 2025
- Valid until
- Oct 6, 2026 (68 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 32FD434B2A6557B730FA296C6D3E7011
- SHA-256 fingerprint
- 97:22:0A:2E:05:97:64:B1:B6:0E:B1:BB:D7:04:3C:51:77:81:39:4B:DC:0F:30:9B:4C:F5:62:D8:26:70:A5:60
- Chain
- GEANT TLS RSA 1 → HARICA TLS RSA Root CA 2021 → Hellenic Academic and Research Institutions RootCA 2015
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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