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 to-na.si
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.to-na.si
- Valid from
- Aug 11, 2026
- Valid until
- Nov 9, 2026 (50 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06A0EC5203A70B454A4802483F0C70F240B0
- SHA-256 fingerprint
- 01:EF:84:14:15:46:5A:21:B9:15:87:CB:EF:92:4E:8F:FA:02:0F:B3:10:96:6A:EC:5B:31:96:87:0C:F7:C0:9A
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Aug 17, 2026.
Never get surprised by to-na.si's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch to-na.si 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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