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 relex-cs.be

Valid
Issued by (CA)
Let's Encrypt
Subject
relex-cs.be
Valid from
Sep 17, 2026
Valid until
Dec 16, 2026 (40 days remaining)
Public key
EC 384-bit
Serial
05C6E69E2951F2C123A233D5E19E6BC0DFE2
SHA-256 fingerprint
A3:EC:A8:79:C8:C7:71:1F:3A:0F:A5:2D:2F:51:93:1C:56:74:01:01:35:04:5D:F6:18:E7:27:5A:99:67:AE:95
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (2)
relex-cs.be, www.relex-cs.be

Certificate Authority Authorization (CAA)

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

Never get surprised by relex-cs.be's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch relex-cs.be continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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.

Monitor this certificate free

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