SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
l-up.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for l-up.co.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.l-up.co.jp
- Valid from
- Jul 16, 2026
- Valid until
- Oct 14, 2026 (61 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 052810D701969437ACEFD2B43526021FCA92
- SHA-256 fingerprint
- 9A:EA:55:13:24:25:8E:24:E9:62:2C:F9:99:19:B2:31:7C:7D:6E:6F:1F:82:0A:04:05:52:C2:03:54:9D:B3:9C
- 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 l-up.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch l-up.co.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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