SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
computer-store.biz
SSL/TLS Certificate
SSL/TLS Certificate for computer-store.biz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- computerwerke-viechtach.de
- Valid from
- Sep 19, 2026
- Valid until
- Dec 18, 2026 (32 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05A7CDAD61D6995AA71BBF8B721DE02085B5
- SHA-256 fingerprint
- 13:F1:9C:5F:EF:3C:65:56:E0:F6:1C:62:3E:D9:DF:10:F5:D9:FF:C1:58:16:8F:91:2A:28:A0:0B:A1:E2:A5:57
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Oct 3, 2026.
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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.
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