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
- Oct 18, 2026
- Valid until
- Jan 16, 2027 (88 days remaining)
- Public key
- EC 256-bit
- Serial
- BE035B19387E7FA70E1E9D042B283CA1
- SHA-256 fingerprint
- BA:E3:97:89:D5:22:10:08:40:11:59:DA:01:58:B9:3A:22:12:33:A1:D7:8F:31:3A:40:FC:E8:45:3D:7C:D4:A0
- Chain
- WE1 → GTS Root R4
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 6, 2026.
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This is today's certificate. Turn on monitoring and we'll watch r-tec.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, 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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