SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
k-12edu.com.cn
SSL/TLS Certificate
SSL/TLS Certificate for k-12edu.com.cn
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- k-12edu.com.cn
- Valid from
- Nov 3, 2026
- Valid until
- Feb 1, 2027 (82 days remaining)
- Public key
- EC 256-bit
- Serial
- 06824FBC41F73EEC82179AF5497602635058
- SHA-256 fingerprint
- FF:D7:9B:CB:B5:E5:34:FD:0E:68:9D:DA:2C:5E:16:04:8D:A8:0E:03:6F:05:85:DF:AF:DF:6E:FF:35:79:E3:D2
- Chain
- YE2 → Root YE → ISRG Root X2 → 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 Oct 6, 2026.
Never get surprised by k-12edu.com.cn's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch k-12edu.com.cn 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.