SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for a2a.pt
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.a2a.pt
- Valid from
- May 23, 2026
- Valid until
- Aug 21, 2026 (30 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0671C11912B9918252587E96F564EBE1BD29
- SHA-256 fingerprint
- 0F:7B:0C:BB:5A:95:4E:9E:78:46:CE:D1:92:99:6F:C5:2B:0D:95:DD:21:11:7F:6A:91:ED:D3:72:3F:A1:3A:E5
- Chain
- R12 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.