SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sanko-as.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for sanko-as.co.jp
Self-signed- Issued by (CA)
- SomeOrganization
- Subject
- localhost.localdomain
- Valid from
- Aug 19, 2013
- Valid until
- Aug 19, 2014 (expired 4469 days ago)
- Public key
- RSA 1024-bit
- Serial
- 15B7
- SHA-256 fingerprint
- FB:07:E5:0F:10:25:18:8D:3B:76:61:40:30:98:0C:1E:25:C7:29:EB:03:2B:64:C8:00:DD:46:48:0F:ED:C3:15
- Chain
- localhost.localdomain
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 Oct 1, 2026.
Never get surprised by sanko-as.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sanko-as.co.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.