SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
oosone-gas.com
SSL/TLS Certificate
SSL/TLS Certificate for oosone-gas.com
Expired- Issued by (CA)
- Sectigo Limited
- Subject
- www.zead.co.jp
- Valid from
- Jul 9, 2025
- Valid until
- Jul 31, 2026 (expired 102 days ago)
- Public key
- RSA 2048-bit
- Serial
- C52D43F22E4297C641846C5D5A00B3CA
- SHA-256 fingerprint
- D1:50:2D:EA:13:DB:C0:7B:56:05:94:E8:2E:4D:67:F5:E0:DA:7A:55:2F:32:40:9E:DA:62:E0:07:F7:2C:0D:24
- Chain
- Sectigo Public Server Authentication CA OV R36 → Sectigo Public Server Authentication Root R46 → 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
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DNS changes
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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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