SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
hakodate-jc.ac.jp
SSL/TLS Certificate
SSL/TLS Certificate for hakodate-jc.ac.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- hakodate-jc.ac.jp
- Valid from
- Jun 8, 2026
- Valid until
- Sep 6, 2026 (36 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 068FA5AB18524D2EA9BFB7C8489582B4595F
- SHA-256 fingerprint
- BC:88:57:4A:13:3E:AC:5F:9B:2C:52:2F:BB:9B:5D:DB:0D:7E:F7:BD:25:C2:3A:94:24:46:BA:2E:4F:1D:F0:C7
- 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.
Never get surprised by hakodate-jc.ac.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch hakodate-jc.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, 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.