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 km-tec.co.kr

Expired
Issued by (CA)
Sectigo Limited
Subject
km-tec.co.kr
Valid from
Sep 13, 2025
Valid until
Sep 13, 2026 (expired 62 days ago)
Public key
RSA 2048-bit
Serial
D06606BDB602A5CC84B505F9B20FBE83
SHA-256 fingerprint
4F:39:8F:9F:DA:4D:22:28:30:58:41:8C:12:8A:12:A1:16:14:D0:14:AA:06:4D:B7:DE:67:FB:3D:ED:4F:E8:79
Chain
Sectigo RSA Domain Validation Secure Server CA → USERTrust RSA Certification Authority
Subject Alternative Names (2)
km-tec.co.kr, www.km-tec.co.kr

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 Nov 14, 2026.

Never get surprised by km-tec.co.kr's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch km-tec.co.kr continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.