SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
a-data.dk
SSL/TLS Certificate
SSL/TLS Certificate for a-data.dk
Valid- Issued by (CA)
- Google Trust Services
- Subject
- a-data.dk
- Valid from
- Aug 31, 2026
- Valid until
- Nov 29, 2026 (71 days remaining)
- Public key
- EC 256-bit
- Serial
- D6CE64AAF0F9B0970E089C5459361048
- SHA-256 fingerprint
- 18:FC:14:B9:B5:FB:EF:DF:48:2F:CB:FD:F3:B6:AD:B7:8D:A9:45:A7:33:B9:C3:40:F3:AF:74:50:AA:94:DC:24
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Sep 18, 2026.
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This is today's certificate. Turn on monitoring and we'll watch a-data.dk continuously, notifying you the moment anything moves across all three signals:
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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