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 o-mag.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- o-mag.ch
- Valid from
- Aug 20, 2026
- Valid until
- Nov 18, 2026 (66 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05F49056CBB3593C84CB96F6FF497BE083A3
- SHA-256 fingerprint
- B7:5D:A3:CD:F0:C1:92:7B:FF:C4:CF:03:53:FD:E7:92:74:3C:BE:E4:01:C1:85:62:D5:74:FD:A5:C0:AA:1C:44
- 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.
Never get surprised by o-mag.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch o-mag.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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