SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
gs-one.co.kr
SSL/TLS Certificate
SSL/TLS Certificate for gs-one.co.kr
Self-signed- Issued by (CA)
- Default Company Ltd
- Subject
- —
- Valid from
- Oct 22, 2018
- Valid until
- Jun 12, 2044 (6446 days remaining)
- Public key
- RSA 2048-bit
- Serial
- ED2795E69E89F240
- SHA-256 fingerprint
- 33:4B:6A:9C:56:EE:3C:F3:60:08:C0:5A:2B:B8:E4:76:68:B8:D0:7C:56:A9:6E:50:A3:7E:E3:FB:3E:DB:3A:4F
- Chain
- —
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Sep 20, 2026.
Never get surprised by gs-one.co.kr's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch gs-one.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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.