SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
seibu-shop.jp
SSL/TLS Certificate
SSL/TLS Certificate for seibu-shop.jp
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- *.seibu-shop.jp
- Valid from
- Mar 11, 2026
- Valid until
- Apr 12, 2027 (160 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 31E3A4418EB5DC0587677AF6
- SHA-256 fingerprint
- A2:78:59:61:04:05:8C:16:99:B2:B6:27:31:8F:8D:52:57:C9:6E:92:15:1F:47:05:F7:CC:6A:D8:5B:40:CA:93
- Chain
- GlobalSign RSA OV SSL CA 2018 → GlobalSign
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by seibu-shop.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch seibu-shop.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, 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.