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 ja-si.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.ja-si.ch
- Valid from
- Oct 17, 2026
- Valid until
- Jan 15, 2027 (84 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05E74260765E2406BAE0231F7814628DA9AD
- SHA-256 fingerprint
- 06:AD:E8:94:CB:0D:BE:B7:4E:CA:68:AD:6F:96:CC:63:60:79:31:1C:53:21:22:D7:2A:53:11:8D:CC:7B:06:20
- 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 ja-si.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ja-si.ch 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, CNAME, TXT 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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