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 nijhof-wassink.com.pl

Expired
Issued by (CA)
Sectigo Limited
Subject
*.verzameldwerk.com
Valid from
Sep 18, 2023
Valid until
Oct 17, 2024 (expired 757 days ago)
Public key
RSA 4096-bit
Serial
816432AB146126D7E739965E17FA5F27
SHA-256 fingerprint
C3:E4:EA:43:B1:4D:58:F6:C1:65:39:D5:9B:23:FF:D4:7D:44:96:09:31:82:7E:1B:7F:E7:9E:D3:C2:53:47:F7
Chain
Sectigo RSA Domain Validation Secure Server CA → USERTrust RSA Certification Authority
Subject Alternative Names (2)
*.verzameldwerk.com, verzameldwerk.com

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 14, 2026.

Never get surprised by nijhof-wassink.com.pl's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch nijhof-wassink.com.pl 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.