SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
rund-um-sprache.ch
SSL/TLS Certificate
SSL/TLS Certificate for rund-um-sprache.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- rund-um-sprache.ch
- Valid from
- Sep 19, 2026
- Valid until
- Dec 18, 2026 (43 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 052161D0F5C077A6F35C02ED04B527FCAEA2
- SHA-256 fingerprint
- E3:34:6B:71:33:C1:FA:75:7E:BF:B9:F8:E2:04:6A:83:3E:5F:22:C0:31:91:7D:AC:4F:41:DE:AE:74:F9:D9:B4
- 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 rund-um-sprache.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch rund-um-sprache.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.