SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
nu-tec.co.kr
SSL/TLS Certificate
SSL/TLS Certificate for nu-tec.co.kr
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- nu-tec.co.kr
- Valid from
- Jun 26, 2026
- Valid until
- Sep 24, 2026 (58 days remaining)
- Public key
- EC 256-bit
- Serial
- 05C3168A85ED01E7EF03D7BACAEE4F5D4D26
- SHA-256 fingerprint
- 68:67:A5:C6:16:EF:0A:8D:6D:83:0A:40:07:AA:ED:E3:19:4C:F7:CC:B9:B7:AB:66:25:7B:18:9A:4B:05:59:84
- 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 nu-tec.co.kr's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch nu-tec.co.kr 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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.