SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
telekom-stiftung.de
SSL/TLS Certificate
SSL/TLS Certificate for telekom-stiftung.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- telekom-stiftung.de
- Valid from
- Aug 4, 2026
- Valid until
- Nov 2, 2026 (78 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06306BC4DFF233F6EB5681BA3B6BDEF81E83
- SHA-256 fingerprint
- A9:38:F3:BE:FE:FC:22:C4:86:93:B5:34:12:0D:A0:50:4D:38:CC:B6:BE:30:1B:1F:9B:64:C1:AF:2B:BD:72:26
- Chain
- YR2 → 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 telekom-stiftung.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch telekom-stiftung.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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