SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
a-affiliate.jp
SSL/TLS Certificate
SSL/TLS Certificate for a-affiliate.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.a-affiliate.jp
- Valid from
- Sep 9, 2026
- Valid until
- Dec 8, 2026 (37 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0696FC5F1BE99C613225C0AE259EB10E2AB7
- SHA-256 fingerprint
- B5:99:39:1C:2B:3B:ED:C1:E6:7B:89:59:0C:A0:80:55:67:A6:99:75:AA:8C:27:BE:1B:C6:C4:0F:80:FD:26:75
- 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 Oct 27, 2026.
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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.
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