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 tkb.ch
Valid- Issued by (CA)
- SwissSign AG
- Subject
- portal.tkb.ch
- Valid from
- Mar 3, 2026
- Valid until
- Mar 3, 2027 (178 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 44B68E97DEEC4562B1B6D7314705938B4E24E4A7
- SHA-256 fingerprint
- 1A:A2:8A:47:DD:26:51:C9:37:D7:F1:87:A3:43:6B:28:FD:E6:CA:AC:8A:84:F3:29:52:13:4F:F8:CD:E4:25:96
- Chain
- SwissSign RSA TLS EV ICA 2022 - 1 → SwissSign RSA TLS Root CA 2022 - 1 → SwissSign Gold CA - G2
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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