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 zg.ch
Valid- Issued by (CA)
- SwissSign AG
- Subject
- zg.ch
- Valid from
- Mar 17, 2026
- Valid until
- Oct 1, 2026 (28 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 412A229928372036C144432EC6FB81E4CA4603F1
- SHA-256 fingerprint
- EE:6A:C9:3D:E9:41:35:44:34:64:C2:46:7D:5F:50:EA:0B:75:EB:BF:35:BC:90:FB:E3:8B:9B:85:A5:F7:70:AA
- Chain
- SwissSign RSA TLS DV ICA 2022 - 1 → SwissSign RSA TLS Root CA 2022 - 1 → SwissSign Gold CA - G2
Certificate Authority Authorization (CAA)
CAA restricts issuance to digicert.com, letsencrypt.org, swisssign.com; we couldn't map the serving CA (SwissSign AG) to one of these identifiers.
Never get surprised by zg.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch zg.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, 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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