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 w-n.de
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- w-n.de
- Valid from
- Apr 18, 2026
- Valid until
- Nov 2, 2026 (97 days remaining)
- Public key
- RSA 2048-bit
- Serial
- FE221FDDA59CF93C60C25297273F9243
- SHA-256 fingerprint
- 32:17:03:62:AD:EA:B9:50:65:FD:5A:F9:FD:A3:F4:96:70:B1:9B:E9:E8:98:9F:DA:BA:74:75:B1:09:69:29:48
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by w-n.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch w-n.de 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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