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 icha-navi.site

Valid
Issued by (CA)
Let's Encrypt
Subject
icha-navi.site
Valid from
Oct 2, 2026
Valid until
Dec 31, 2026 (79 days remaining)
Public key
RSA 2048-bit
Serial
05EA0FFFDE42E78F8DF311BF2058D8BE425A
SHA-256 fingerprint
D4:6F:0D:10:43:EC:2A:C4:4D:2C:1D:FE:A7:94:35:90:D9:3C:06:3F:3C:C8:94:D8:59:9C:95:1F:4F:66:A9:58
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (2)
icha-navi.site, www.icha-navi.site

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 11, 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, 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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