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 mjac.pt
Self-signed- Issued by (CA)
- cp02.online.pt
- Subject
- cp02.online.pt
- Valid from
- Nov 6, 2026
- Valid until
- Nov 6, 2027 (363 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 5BE302635F7CF54354BE0C77CF730A6D83F12AD7
- SHA-256 fingerprint
- 88:21:30:1B:DB:A6:5F:CA:A3:C5:01:8F:04:90:21:10:EA:AF:E6:C6:E6:A7:EC:27:56:4D:43:30:44:A9:42:F0
- Chain
- cp02.online.pt
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
We watch NS, MX, CAA, CNAME, TXT 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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