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 pleno-nagata.net

Valid
Issued by (CA)
Let's Encrypt
Subject
pleno-nagata.net
Valid from
Sep 23, 2026
Valid until
Dec 22, 2026 (84 days remaining)
Public key
RSA 4096-bit
Serial
0618A0F9FA1996B9C1DFE0848B779AF6D8BF
SHA-256 fingerprint
8D:FC:42:20:7A:8F:6F:B9:F1:12:6D:87:26:60:0F:94:9A:A4:10:BD:B4:3F:00:86:98:91:0C:1B:CE:78:5B:C4
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (1)
pleno-nagata.net

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 Aug 24, 2026.

Never get surprised by pleno-nagata.net's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch pleno-nagata.net 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.