SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
c-linkage.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for c-linkage.co.jp
Valid- Issued by (CA)
- DigiCert Inc
- Subject
- c-linkage.co.jp
- Valid from
- Oct 15, 2026
- Valid until
- May 1, 2027 (169 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0F011FB402310272B0A93F4AA35B6EEF
- SHA-256 fingerprint
- 73:13:95:74:B8:71:E9:1F:17:4F:05:65:4D:B6:28:A1:57:45:C6:5E:40:98:57:25:06:E1:DC:20:12:AA:E8:6B
- Chain
- RapidSSL TLS RSA CA G1 → DigiCert Global Root G2
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Oct 23, 2026.
Never get surprised by c-linkage.co.jp's certificate expiring
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Uptime
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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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