SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ars-magna.jp
SSL/TLS Certificate
SSL/TLS Certificate for ars-magna.jp
Valid- Issued by (CA)
- Japan Registry Services Co., Ltd.
- Subject
- ars-magna.jp
- Valid from
- Jul 19, 2026
- Valid until
- Oct 16, 2026 (39 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 5BD9F3C519E39D35C0698635EC0D7078
- SHA-256 fingerprint
- 60:F8:43:59:01:AB:74:2F:8F:42:09:7C:9E:F7:96:97:E8:0B:07:6B:1F:F0:66:1D:B9:16:3E:D5:09:68:7B:AF
- Chain
- JPRS DV RSA CA 2024 G1 → SECOM TLS RSA Root CA 2024
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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Uptime
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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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