SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ja-tagawa.or.jp
SSL/TLS Certificate
SSL/TLS Certificate for ja-tagawa.or.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ja-tagawa.or.jp
- Valid from
- Sep 25, 2026
- Valid until
- Dec 24, 2026 (48 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05D67D9ADFFE34D370A3D611E74D7790B878
- SHA-256 fingerprint
- 69:28:4A:AE:9E:65:FE:68:72:66:AA:BB:C3:15:3C:BC:80:83:52:EB:CD:86:18:5B:9B:CA:1B:A9:42:5E:C3:AF
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Nov 4, 2026.
Never get surprised by ja-tagawa.or.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ja-tagawa.or.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, 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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