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 magnum303.net

Expiring soon
Issued by (CA)
Let's Encrypt
Subject
magnum303.net
Valid from
Jul 8, 2026
Valid until
Oct 6, 2026 (19 days remaining)
Public key
EC 256-bit
Serial
053DDFC878F024DC33F3A7406492E4F463CB
SHA-256 fingerprint
2B:1F:6B:79:C3:68:47:20:57:6F:85:B5:B9:CE:F0:8E:E4:8D:38:EA:C4:71:A3:9C:E4:74:76:23:70:AA:02:47
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (2)
magnum303.net, www.magnum303.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 Sep 14, 2026.

Never get surprised by magnum303.net's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch magnum303.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.