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 sp-s.de
Self-signed- Issued by (CA)
- sp-s.de.df-171611.dummy
- Subject
- sp-s.de.df-171611.dummy
- Valid from
- Sep 18, 2025
- Valid until
- Sep 18, 2026 (expired 7 days ago)
- Public key
- RSA 2048-bit
- Serial
- 768EFC15
- SHA-256 fingerprint
- DB:62:44:ED:4F:29:E4:67:7C:C8:AE:23:C5:A8:9B:3D:22:8D:EB:EE:60:61:B6:F4:F3:CC:44:8B:AB:8A:B2:6A
- Chain
- sp-s.de.df-171611.dummy
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by sp-s.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sp-s.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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