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 okna-partnerka1.online

Valid
Issued by (CA)
Let's Encrypt
Subject
okna-partnerka1.online
Valid from
Sep 28, 2026
Valid until
Dec 27, 2026 (46 days remaining)
Public key
RSA 4096-bit
Serial
05D382C66D03C62AAD4539DC26965516F10D
SHA-256 fingerprint
EA:EF:23:0E:8A:B2:1D:25:BF:CF:7F:28:59:4B:91:5F:51:60:BF:8E:69:D6:A3:EE:8D:A8:6E:21:73:64:5D:44
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (2)
okna-partnerka1.online, www.okna-partnerka1.online

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 Oct 5, 2026.

Never get surprised by okna-partnerka1.online's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch okna-partnerka1.online 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.