SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ktc-sendai.com
SSL/TLS Certificate
SSL/TLS Certificate for ktc-sendai.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ktc-sendai.com
- Valid from
- Sep 5, 2026
- Valid until
- Dec 4, 2026 (75 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06A1C84EFAFE99F95311E3DFC817B116C2CF
- SHA-256 fingerprint
- 49:F5:72:45:F6:74:04:F5:60:7F:B0:61:D3:24:09:83:BF:88:8D:20:2C:7D:B9:6C:20:FE:E7:76:07:C5:1A:08
- 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 17, 2026.
Never get surprised by ktc-sendai.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ktc-sendai.com 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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