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 ap-file.jp

Valid
Issued by (CA)
Let's Encrypt
Subject
ap-file.jp
Valid from
Jul 14, 2026
Valid until
Oct 12, 2026 (80 days remaining)
Public key
RSA 2048-bit
Serial
05B5F7B253AE19102E535C8CF52CDA23AB4F
SHA-256 fingerprint
57:ED:B1:FB:E8:B3:88:33:63:67:CF:B1:10:CC:14:FB:B8:C7:8B:97:7B:99:14:B1:07:6D:9F:EB:C3:EF:5B:DD
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (1)
ap-file.jp

Certificate Authority Authorization (CAA)

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

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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, 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.

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