SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
a-files.jp
SSL/TLS Certificate
SSL/TLS Certificate for a-files.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.a-files.jp
- Valid from
- Sep 30, 2026
- Valid until
- Dec 29, 2026 (47 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05B87DC5E31D28CB6A18C07D0D6D3384338F
- SHA-256 fingerprint
- 7A:CE:92:16:9B:4C:27:98:F2:55:DC:FF:2E:B4:71:F5:00:A7:C8:DA:40:92:68:A2:22:10:0B:E1:BB:31:BF:AF
- 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.
Never get surprised by a-files.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch a-files.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.