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 it-em.pl
Untrusted chain- Issued by (CA)
- Sectigo Limited
- Subject
- it-em.pl
- Valid from
- Aug 18, 2026
- Valid until
- Mar 4, 2027 (159 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 0C4F2932F6A32784F87CB5116EB6F311
- SHA-256 fingerprint
- EE:45:55:9E:A7:E5:28:2A:84:46:87:20:88:E3:0E:34:5E:62:56:D2:E8:7E:90:39:C2:16:06:39:D5:E0:9F:F7
- Chain
- —
Certificate Authority Authorization (CAA)
The serving CA (Sectigo Limited) is authorized by this domain's CAA records (certum.pl, letsencrypt.org, sectigo.com).
Never get surprised by it-em.pl's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch it-em.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.
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