SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
bt-architecture.fr
SSL/TLS Certificate
SSL/TLS Certificate for bt-architecture.fr
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- bt-architecture.fr
- Valid from
- Aug 8, 2026
- Valid until
- Nov 6, 2026 (89 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05FBB1D6DAAAC37F4C22CA1066BC0B8670B8
- SHA-256 fingerprint
- 5E:30:16:E0:F7:8D:82:BD:50:E5:22:72:13:93:8A:1B:47:53:94:CD:EC:DA:38:F5:B5:E6:83:D4:77:86:18:71
- 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 bt-architecture.fr's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch bt-architecture.fr 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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