SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sg-tech.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for sg-tech.co.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- sg-tech.co.jp
- Valid from
- Jul 19, 2026
- Valid until
- Oct 17, 2026 (86 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0569774FDED240D1B74F96AC2D887E1AF5FC
- SHA-256 fingerprint
- 98:7B:3D:38:14:4F:EB:31:69:B8:AC:4D:7A:EA:9C:55:DC:AA:16:F1:E9:48:85:C9:85:71:D7:28:4D:A4:4D:E3
- Chain
- YR2 → Root YR → ISRG Root X1
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 Jul 22, 2026.
Never get surprised by sg-tech.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sg-tech.co.jp 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.