SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kwansei-ac.jp
SSL/TLS Certificate
SSL/TLS Certificate for kwansei-ac.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- kwansei-ac.jp
- Valid from
- Nov 11, 2026
- Valid until
- Feb 9, 2027 (89 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05636A72BCF58D2AD8C3A253715202220DE1
- SHA-256 fingerprint
- 04:80:8C:C0:1C:A4:B1:7B:CB:FF:EA:68:AD:50:A7:39:A9:2D:A6:56:2F:67:08:1B:47:6D:4E:DF:0A:4A:6B:CC
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by kwansei-ac.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch kwansei-ac.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.