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 tw.pt
Valid- Issued by (CA)
- ZeroSSL GmbH
- Subject
- tw.pt
- Valid from
- Jul 2, 2026
- Valid until
- Sep 30, 2026 (34 days remaining)
- Public key
- EC 256-bit
- Serial
- DE9E892CB5D81547A43A19A43693C9BF
- SHA-256 fingerprint
- 53:7E:96:52:7C:3A:60:F2:21:3A:0E:F0:FE:AA:14:F4:77:98:BF:57:0F:10:2F:40:27:76:39:A4:80:EA:38:B0
- Chain
- ZeroSSL ECC DV SSL CA 2 → Sectigo Public Server Authentication Root E46 → USERTrust ECC 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
We watch NS, MX, CAA, DNSSEC, CNAME 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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