SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
iwt-institut.ch
SSL/TLS Certificate
SSL/TLS Certificate for iwt-institut.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ce-zeichen.ch
- Valid from
- Aug 24, 2026
- Valid until
- Nov 22, 2026 (68 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0548B61F7ED4F550326A3F117B8692E57D4B
- SHA-256 fingerprint
- DA:4B:9D:4D:B3:61:4B:73:08:83:FD:A0:8D:47:9D:95:1B:32:A7:48:B9:F6:93:A4:4E:7B:13:DF:F7:44:E6:A8
- 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.
Never get surprised by iwt-institut.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch iwt-institut.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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.