SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ns-stage.jp
SSL/TLS Certificate
SSL/TLS Certificate for ns-stage.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ns-stage.jp
- Valid from
- Jun 4, 2026
- Valid until
- Sep 2, 2026 (37 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05A08DF5CD991C2FDC58D2B3071C8A621068
- SHA-256 fingerprint
- A1:4C:42:9A:1C:D4:F7:91:61:17:9C:5C:24:2D:7C:25:C0:1C:50:80:8B:ED:A3:20:5D:80:92:8D:8A:F1:4B:6A
- 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 ns-stage.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ns-stage.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.