SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
cm-castromarim.pt
SSL/TLS Certificate
SSL/TLS Certificate for cm-castromarim.pt
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- cm-castromarim.pt
- Valid from
- Jul 3, 2026
- Valid until
- Oct 1, 2026 (61 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05066DBD586439316B1A9CA968A2D40A8D48
- SHA-256 fingerprint
- 3E:15:FC:12:40:F4:09:89:23:04:1F:A0:E0:EA:12:6E:56:3D:41:82:9F:1F:C9:47:DE:A7:DA:A3:BF:82:A3:13
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (comodoca.com, globalsign.com, letsencrypt.org, sectigo.com).
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Uptime
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DNS changes
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TLS certificate
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