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 bi-o.no
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- bi-o.no
- Valid from
- Oct 17, 2026
- Valid until
- Jan 15, 2027 (61 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 059EB8361A373C5F186EBB98FCA90F89CA62
- SHA-256 fingerprint
- DF:D0:8C:50:5A:43:B7:76:6F:4E:30:39:9D:4D:85:20:80:EC:9E:C0:EA:35:4E:6A:2F:4B:D9:9C:AE:95:63:55
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Sep 28, 2026.
Never get surprised by bi-o.no's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch bi-o.no 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, CNAME, TXT 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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