SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
tennur.is
SSL/TLS Certificate
SSL/TLS Certificate for tennur.is
Valid- Issued by (CA)
- Google Trust Services
- Subject
- tennur.is
- Valid from
- Aug 6, 2026
- Valid until
- Nov 4, 2026 (50 days remaining)
- Public key
- EC 256-bit
- Serial
- 9705FD089CC7AD3D13D48CBA33F5DA3F
- SHA-256 fingerprint
- 14:A5:3C:64:AF:1B:CF:39:6D:4A:7A:F5:6D:C2:14:8A:CE:0F:C7:4B:7D:97:B5:D1:B2:A8:8B:42:80:17:BD:E4
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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This is today's certificate. Turn on monitoring and we'll watch tennur.is 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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