SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
m-chair.jp
SSL/TLS Certificate
SSL/TLS Certificate for m-chair.jp
Valid- Issued by (CA)
- Japan Registry Services Co., Ltd.
- Subject
- www.m-chair.jp
- Valid from
- Aug 2, 2026
- Valid until
- Jan 31, 2027 (118 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 1E451B7E63A721146F9AA18E51A586BF
- SHA-256 fingerprint
- B5:B7:91:85:A9:9D:FD:DF:43:E4:68:27:97:F1:13:40:C6:41:D6:F5:5F:27:DF:A4:E8:AD:57:BE:A8:6F:71:5F
- 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.
This certificate has been served since Aug 11, 2026.
Never get surprised by m-chair.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch m-chair.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.
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