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 0x49.net

Expired
Issued by (CA)
Let's Encrypt
Subject
0x49.eu
Valid from
Jun 1, 2026
Valid until
Aug 30, 2026 (expired 17 days ago)
Public key
RSA 2048-bit
Serial
05938473999A8770E0971C1A96BFF1D092C1
SHA-256 fingerprint
43:6B:3D:3D:86:93:EA:6C:E4:17:4B:E1:61:50:8C:41:0B:13:71:16:BB:C2:D4:35:18:F1:1A:6D:86:FC:88:2F
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (4)
0x49.eu, 0x49.net, www.0x49.eu, www.0x49.net

Certificate Authority Authorization (CAA)

The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).

This certificate has been served since Sep 12, 2026.

Never get surprised by 0x49.net's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch 0x49.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.