SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
aztc-courses.com
SSL/TLS Certificate
SSL/TLS Certificate for aztc-courses.com
Expired- Issued by (CA)
- Sectigo Limited
- Subject
- aztc-courses.com
- Valid from
- Aug 1, 2024
- Valid until
- Aug 1, 2025 (expired 399 days ago)
- Public key
- RSA 2048-bit
- Serial
- 56346C28E72D4A907BE8988323192099
- SHA-256 fingerprint
- EF:FE:AA:BF:1E:8C:B2:00:FF:CB:3F:30:46:4F:06:6C:3D:BA:C0:8C:20:21:B9:30:03:13:CB:9F:06:58:A4:5D
- Chain
- Sectigo RSA Domain Validation Secure Server CA → USERTrust RSA Certification Authority
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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