SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for afrel-s.jp

Valid
Issued by (CA)
Let's Encrypt
Subject
afrel-s.jp
Valid from
Aug 8, 2026
Valid until
Nov 6, 2026 (55 days remaining)
Public key
RSA 2048-bit
Serial
0551B5A64D006C564F9EE20C7C7E22F12987
SHA-256 fingerprint
E6:00:1B:9F:45:AD:A8:E7:75:38:C1:45:13:0D:26:5D:28:D2:AA:57:6E:DC:82:5B:6B:A7:92:64:4B:F9:E5:E1
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (2)
afrel-s.jp, www.afrel-s.jp

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by afrel-s.jp's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch afrel-s.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, 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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.