SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
notion.si
SSL/TLS Certificate
SSL/TLS Certificate for notion.si
Expiring soon- Issued by (CA)
- Let's Encrypt
- Subject
- notion.si
- Valid from
- Jul 27, 2026
- Valid until
- Oct 25, 2026 (8 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 057EA86CDDBD174B3F3724161652D3EA3FD2
- SHA-256 fingerprint
- 8F:9D:02:61:8D:DA:86:9E:48:CE:AF:02:D0:D2:28:09:4C:91:4D:FC:75:D6:5D:08:D6:0E:A7:D2:5A:95:53:77
- Chain
- YR1 → Root YR → ISRG Root X1
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 Oct 5, 2026.
Never get surprised by notion.si's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch notion.si continuously, notifying you the moment anything moves across all three signals:
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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