SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
gyutto.me
SSL/TLS Certificate
SSL/TLS Certificate for gyutto.me
Valid- Issued by (CA)
- Nijimo, Inc.
- Subject
- gyutto.me
- Valid from
- Dec 25, 2025
- Valid until
- Jan 24, 2027 (159 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 7A453FAB57A11A91A177D585B9F6DAA4
- SHA-256 fingerprint
- 9D:5A:51:59:E2:4B:08:C7:11:8D:38:0E:F2:7E:E0:D1:67:D9:48:D5:46:DF:4A:64:7E:28:9E:D5:DA:38:B7:CE
- Chain
- FujiSSL RSA Domain Validation Secure Server CA 2 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
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 Aug 15, 2026.
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This is today's certificate. Turn on monitoring and we'll watch gyutto.me 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, 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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