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 wichir.waw.pl

Valid
Issued by (CA)
Asseco Data Systems S.A.
Subject
*.wichir.waw.pl
Valid from
Jan 2, 2026
Valid until
Jan 2, 2027 (148 days remaining)
Public key
RSA 2048-bit
Serial
2F24B2A66B3B6E9EEA1273E2671140EE
SHA-256 fingerprint
5D:EE:77:A0:94:7F:4D:46:EE:2C:CF:DE:4C:BA:2E:7B:63:10:0D:59:E3:11:B1:C6:1B:93:B8:B7:5A:AA:1A:01
Chain
Certum DV TLS G2 R39 CA → Certum Trusted Root CA
Subject Alternative Names (2)
*.wichir.waw.pl, wichir.waw.pl

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 6, 2026.

Never get surprised by wichir.waw.pl's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch wichir.waw.pl 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.