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 r-tec.ch
Valid- Issued by (CA)
- Google Trust Services
- Subject
- r-tec.ch
- Valid from
- Aug 19, 2026
- Valid until
- Nov 17, 2026 (42 days remaining)
- Public key
- EC 256-bit
- Serial
- 3EBD609E03A40FEF0E236D74A74B891F
- SHA-256 fingerprint
- 4A:00:4B:00:7E:F4:0E:03:93:E1:08:46:E3:E4:3E:EB:57:D7:0E:77:FD:01:8F:F3:65:93:FD:8C:A1:0B:DA:DE
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Aug 4, 2026.
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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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