SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
cn-ok.com
SSL/TLS Certificate
SSL/TLS Certificate for cn-ok.com
Expired- Issued by (CA)
- TrustAsia Technologies, Inc.
- Subject
- webtest.glbdns.com
- Valid from
- Feb 18, 2020
- Valid until
- Feb 17, 2021 (expired 1997 days ago)
- Public key
- RSA 2048-bit
- Serial
- 0C565D66F2981711029254A574BB8DE7
- SHA-256 fingerprint
- C6:A0:22:6E:90:BC:F1:34:14:90:54:51:1B:76:87:64:45:55:4D:D3:9E:9C:CC:D4:AB:ED:32:A3:DC:82:D3:5E
- Chain
- TrustAsia TLS RSA CA → DigiCert Global Root CA
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by cn-ok.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch cn-ok.com 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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