SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
thar-ua.pt
SSL/TLS Certificate
SSL/TLS Certificate for thar-ua.pt
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- thar-ua.pt
- Valid from
- Oct 2, 2026
- Valid until
- Dec 31, 2026 (46 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 058CDDC5BA646D641DA2E1F0CBCC56343D21
- SHA-256 fingerprint
- 94:6B:7E:C7:40:6E:3F:8E:8A:A4:2F:9C:94:BE:FD:20:F7:0B:7B:B4:0B:20:1F:00:75:27:A3:34:51:F6:20:33
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 2 previous certificates for this host. This certificate has been served since Oct 5, 2026.
Never get surprised by thar-ua.pt's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch thar-ua.pt continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
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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