SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
edu-z.org
SSL/TLS Certificate
SSL/TLS Certificate for edu-z.org
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- cqzbedu.com
- Valid from
- Sep 25, 2026
- Valid until
- Dec 24, 2026 (81 days remaining)
- Public key
- EC 256-bit
- Serial
- 0657F7F600FE5806712B843BE43FCA4E4584
- SHA-256 fingerprint
- 0F:FB:55:50:24:5A:13:37:FA:EA:D0:B6:5E:C9:A7:9C:8E:07:5A:F3:18:62:B8:3A:D9:47:1E:1F:98:31:60:43
- Chain
- YE1 → 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 Sep 23, 2026.
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This is today's certificate. Turn on monitoring and we'll watch edu-z.org 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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