SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
e-niigata.net
SSL/TLS Certificate
SSL/TLS Certificate for e-niigata.net
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- e-niigata.net
- Valid from
- Nov 10, 2026
- Valid until
- Feb 8, 2027 (89 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0629FEF42E15B78C9664DB97EAB3DE23EAE4
- SHA-256 fingerprint
- D1:70:8A:E8:B9:CB:E7:CF:85:7D:DD:9C:F4:70:96:FA:9B:0A:81:8C:DB:72:0E:49:CE:74:7E:FF:A5:3A:05:39
- 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.
We've observed 4 previous certificates for this host. This certificate has been served since Oct 21, 2026.
Never get surprised by e-niigata.net's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch e-niigata.net 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.
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