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 maciekjazwiecki.com

Hostname mismatch
Issued by (CA)
Amazon
Subject
*.visura.co
Valid from
Jan 5, 2026
Valid until
Feb 2, 2027 (103 days remaining)
Public key
RSA 2048-bit
Serial
0E422EDD118977AFEFE89DBE2D625ECB
SHA-256 fingerprint
59:66:DC:EA:02:92:FF:DF:3D:1A:62:BA:D3:10:1B:39:7A:6D:64:8E:75:36:6A:48:AB:AB:33:8B:3B:E9:22:3C
Chain
Amazon RSA 2048 M01 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
Subject Alternative Names (2)
*.visura.co, visura.co

Certificate Authority Authorization (CAA)

The serving CA (Amazon) is not among the authorities this domain's CAA records authorize (certum.pl, letsencrypt.org). This can indicate a misconfiguration or an unexpected issuance.

This certificate has been served since Oct 8, 2026.

Never get surprised by maciekjazwiecki.com's certificate expiring

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