SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ama-net.ed.jp
SSL/TLS Certificate
SSL/TLS Certificate for ama-net.ed.jp
Valid- Issued by (CA)
- Nijimo, Inc.
- Subject
- www.ama-net.ed.jp
- Valid from
- Mar 28, 2026
- Valid until
- Oct 12, 2026 (73 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 3607E131D3377EB7A802232A2478D6D3
- SHA-256 fingerprint
- A5:C4:7E:AC:FD:68:3C:28:56:CC:AF:8C:61:7F:76:69:2F:C9:23:59:AB:F2:71:DC:E0:88:FD:76:52:35:3C:D5
- Chain
- FujiSSL RSA Domain Validation Secure Server CA 2 → Sectigo Public Server Authentication Root R46
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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