SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
freee-setsuritsu.com
SSL/TLS Certificate
SSL/TLS Certificate for freee-setsuritsu.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- freee-setsuritsu.com
- Valid from
- Sep 13, 2026
- Valid until
- Dec 12, 2026 (78 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06304E4CABF91E604742D9A5121BA2A3C82B
- SHA-256 fingerprint
- 05:57:98:CD:C8:48:4A:15:15:3A:34:22:2D:ED:55:C1:80:9B:9E:BD:31:8B:F7:2C:37:ED:91:79:06:5A:E9:81
- 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.
This certificate has been served since Sep 22, 2026.
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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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