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 0-net.de
Self-signed- Issued by (CA)
- Pi-hole
- Subject
- pi.hole
- Valid from
- Jul 1, 2026
- Valid until
- Aug 17, 2026 (11 days remaining)
- Public key
- EC 384-bit
- Serial
- 393932393331393636393131343732
- SHA-256 fingerprint
- 88:5D:D7:4A:FE:BC:9A:74:6E:B2:EC:AC:36:0D:5F:52:F9:2E:A6:53:0F:E8:0C:A9:CD:C7:8D:A9:37:1E:0D:E4
- Chain
- pi.hole
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by 0-net.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch 0-net.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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