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 a-dec.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- a-dec.ch
- Valid from
- May 19, 2026
- Valid until
- Aug 17, 2026 (25 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0698B7678FAEFC02FB4927A26E4B2E698BEE
- SHA-256 fingerprint
- 5C:D9:07:31:1D:B9:0F:47:DE:35:9D:69:A9:0D:AB:1D:1A:BA:B8:2E:36:71:B1:17:AA:20:07:63:B4:71:E1:31
- Chain
- R13 → 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 a-dec.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch a-dec.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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