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 sp-ar.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- sp-ar.ch
- Valid from
- Aug 17, 2026
- Valid until
- Nov 15, 2026 (47 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 06222057FBFAE10C6C8519D79D78E53D2FF5
- SHA-256 fingerprint
- 3A:91:DD:95:2F:A8:42:A6:17:EC:85:46:AC:94:3D:4C:21:BE:47:EB:91:E6:AA:2C:A9:30:1F:30:42:56:EA:F8
- 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.
Never get surprised by sp-ar.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sp-ar.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.
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