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 dl-a.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- dl-a.ch
- Valid from
- Sep 20, 2026
- Valid until
- Dec 19, 2026 (88 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0526E769A120639A9FDC9D721B87F870376C
- SHA-256 fingerprint
- 36:53:C5:D1:AB:E4:85:9A:67:92:F4:18:A6:1F:29:41:E4:6E:83:F5:B0:6A:4A:8A:C7:4A:2E:13:F9:C9:72:05
- 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 dl-a.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch dl-a.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.