SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
walker-ag.ch
SSL/TLS Certificate
SSL/TLS Certificate for walker-ag.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- walker.swiss
- Valid from
- Sep 9, 2026
- Valid until
- Dec 8, 2026 (58 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0520FCCDBA32814181ED78DCAFCB5EADB50C
- SHA-256 fingerprint
- F2:6B:15:39:BD:EA:3A:ED:4A:01:D3:34:9C:35:7A:C3:B5:75:6E:E5:DA:23:96:4D:2C:B8:D9:33:44:24:D1:3C
- 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.
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Uptime
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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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