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 abak-centrumterapii.pl

Valid
Issued by (CA)
Let's Encrypt
Subject
abak-centrumterapii.pl
Valid from
Sep 27, 2026
Valid until
Dec 26, 2026 (55 days remaining)
Public key
RSA 4096-bit
Serial
059E7425BAE58089CBF1B6956125C18C06E7
SHA-256 fingerprint
4F:5A:72:D3:BE:99:34:4A:AC:1D:C4:63:59:BE:AE:B4:C2:A0:ED:8C:57:FB:23:C7:AD:39:48:A2:5A:69:BD:D1
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (2)
abak-centrumterapii.pl, www.abak-centrumterapii.pl

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by abak-centrumterapii.pl's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch abak-centrumterapii.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.