SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
bt-holding.de
SSL/TLS Certificate
SSL/TLS Certificate for bt-holding.de
Self-signed- Issued by (CA)
- Default SSL Certificate
- Subject
- Default SSL Certificate
- Valid from
- Oct 24, 2017
- Valid until
- Oct 23, 2020 (expired 2101 days ago)
- Public key
- RSA 2048-bit
- Serial
- 59EF4B6100054EF2
- SHA-256 fingerprint
- 62:AB:C7:86:D0:B1:B8:9D:06:0F:3B:51:2D:3F:A1:B5:24:EC:FB:00:C7:C5:E2:C8:16:F1:2C:93:EF:F1:B4:0C
- Chain
- Default SSL Certificate
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by bt-holding.de's certificate expiring
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Uptime
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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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