SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
prima-gakki.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for prima-gakki.co.jp
Valid- Issued by (CA)
- Japan Registry Services Co., Ltd.
- Subject
- prima-gakki.co.jp
- Valid from
- Jun 30, 2026
- Valid until
- Sep 27, 2026 (45 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 2C55060695741D72B8C3BCEFD2108231
- SHA-256 fingerprint
- 01:1F:21:3B:EB:EE:07:6B:D5:6C:76:1B:00:F6:9B:A5:1D:83:2E:8E:BA:58:E1:02:F8:5A:64:F5:3D:BE:B1:3A
- Chain
- JPRS DV RSA CA 2024 G1 → SECOM TLS RSA Root CA 2024
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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.
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