SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for act-a.dk
Valid- Issued by (CA)
- Google Trust Services
- Subject
- act-a.dk
- Valid from
- Sep 3, 2026
- Valid until
- Dec 2, 2026 (79 days remaining)
- Public key
- EC 256-bit
- Serial
- 99C09F051378DBCF0E738F30AAE1BCA7
- SHA-256 fingerprint
- 92:79:9B:88:05:B4:4C:EE:EB:2E:CD:8A:6F:1F:FA:A0:25:2D:15:3F:EF:E2:EC:0B:EE:05:80:08:57:44:D4:BC
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by act-a.dk's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch act-a.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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