SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
u-basi.pl
SSL/TLS Certificate
SSL/TLS Certificate for u-basi.pl
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.u-basi.pl
- Valid from
- Sep 30, 2026
- Valid until
- Dec 29, 2026 (58 days remaining)
- Public key
- EC 384-bit
- Serial
- 0600A0121490213ABE31A34F6BA3143AC9A6
- SHA-256 fingerprint
- 30:CB:A6:A8:08:69:4C:A0:B4:68:36:9F:3C:A2:2F:14:26:C6:A6:E3:70:E0:89:78:66:51:15:2A:64:84:6F:86
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by u-basi.pl's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch u-basi.pl 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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