SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
r-u-ok.org
SSL/TLS Certificate
SSL/TLS Certificate for r-u-ok.org
Hostname mismatch- Issued by (CA)
- Amazon
- Subject
- bit.ly
- Valid from
- Feb 24, 2026
- Valid until
- Sep 9, 2026 (47 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0A925DB512CAF04C62D043CD1764AB49
- SHA-256 fingerprint
- DD:73:1D:5F:33:6B:7A:0A:16:8D:1C:3F:93:C7:FA:CB:18:C2:2B:D3:2F:0E:57:EE:E5:C6:1A:DA:AF:9F:CE:79
- Chain
- Amazon RSA 2048 M01 → Amazon Root CA 1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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