SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
nagoya-aoi.ed.jp
SSL/TLS Certificate
SSL/TLS Certificate for nagoya-aoi.ed.jp
Valid- Issued by (CA)
- DigiCert Inc
- Subject
- www.nagoya-aoi.ed.jp
- Valid from
- Aug 27, 2026
- Valid until
- Mar 5, 2027 (114 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 038BA03A85DEB0FFDB0C3D2F674FDCF8
- SHA-256 fingerprint
- 31:5B:4A:94:2C:33:DE:83:64:39:A7:39:0F:30:EE:27:95:EB:5A:EA:32:FC:94:0F:68:F8:46:4D:A8:BE:BA:91
- Chain
- GeoTrust TLS RSA CA G1 → DigiCert Global Root G2
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 Nov 3, 2026.
Never get surprised by nagoya-aoi.ed.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch nagoya-aoi.ed.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.