SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ast-technology.ch
SSL/TLS Certificate
SSL/TLS Certificate for ast-technology.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ast-technology.ch
- Valid from
- Aug 6, 2026
- Valid until
- Nov 4, 2026 (87 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0639D8FFD3E7E1280A42430C8CDD9A3DE43D
- SHA-256 fingerprint
- 05:C5:E4:64:37:31:5F:BA:18:C4:99:80:1E:96:89:68:EF:BD:5C:46:61:EF:22:E4:ED:D3:A5:F5:47:AC:58:13
- 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 ast-technology.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ast-technology.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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