SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
fas-sapporo.com
SSL/TLS Certificate
SSL/TLS Certificate for fas-sapporo.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.fas-sapporo.com
- Valid from
- Sep 11, 2026
- Valid until
- Dec 10, 2026 (76 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06FE495861EB3925C5D7EDE20757080CB6A3
- SHA-256 fingerprint
- DE:66:54:71:A0:8E:63:12:29:89:2A:8D:74:C9:E7:AF:F3:DC:44:03:F2:1B:86:8E:22:05:8F:51:CF:E0:62:EB
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 21, 2026.
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This is today's certificate. Turn on monitoring and we'll watch fas-sapporo.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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