SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
cm-viana-castelo.com.pt
SSL/TLS Certificate
SSL/TLS Certificate for cm-viana-castelo.com.pt
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- cm-viana-castelo.com.pt
- Valid from
- Jun 27, 2026
- Valid until
- Sep 25, 2026 (64 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 056BEF0BC7F217ABE2BBFDD9C83AD3C7565F
- SHA-256 fingerprint
- D2:EB:BE:AB:CD:0F:FF:FE:7C:73:1D:23:F3:D2:BC:0C:36:63:85:16:AC:58:CC:71:79:31:36:4C:EB:66:A4:AA
- 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 (letsencrypt.org).
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Uptime
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DNS changes
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TLS certificate
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