SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
step-tech.pl
SSL/TLS Certificate
SSL/TLS Certificate for step-tech.pl
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- webmail.step-tech.pl
- Valid from
- Jun 2, 2026
- Valid until
- Aug 31, 2026 (24 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 068788002F72BEE7184F65A2AFED3794C140
- SHA-256 fingerprint
- 5D:FA:41:B4:4E:54:E5:C2:B9:78:D4:77:79:63:6A:75:06:DF:09:7E:8C:C4:13:E5:E8:39:21:B8:49:56:70:F4
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by step-tech.pl's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch step-tech.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.