SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
cnp-laboratory.jp
SSL/TLS Certificate
SSL/TLS Certificate for cnp-laboratory.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- cnp-laboratory.jp
- Valid from
- Oct 13, 2026
- Valid until
- Jan 11, 2027 (67 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 054E54A656983DC12EB6FE352588390843C8
- SHA-256 fingerprint
- DD:3F:E2:BD:8A:79:2D:4B:2E:CC:09:49:0C:17:D7:1E:CA:6D:F4:43:2D:26:75:05:70:13:DB:3D:28:94:9D:3E
- 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 cnp-laboratory.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch cnp-laboratory.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.