SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-3-121-86-140.eu-central-1.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-3-121-86-140.eu-central-1.compute.amazonaws.com
Hostname mismatch- Issued by (CA)
- home.pl S.A.
- Subject
- *.modniewoknie.pl
- Valid from
- Feb 27, 2026
- Valid until
- Feb 27, 2027 (107 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 6581A35E7DF80B359C157816C5A37F1F
- SHA-256 fingerprint
- 5B:4C:2E:D0:51:B7:55:A2:FD:F5:B9:C9:72:55:70:4C:EA:0B:88:D6:CB:FB:BC:B4:35:67:56:0C:D1:FA:51:F7
- Chain
- home pl DV TLS G2 R35 CA → Certum Trusted Root CA → Certum Trusted Network CA
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by ec2-3-121-86-140.eu-central-1.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-3-121-86-140.eu-central-1.compute.amazonaws.com 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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.