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 dc-sa.pl
Valid- Issued by (CA)
- nazwa.pl Sp. z o.o.
- Subject
- dc-sa.pl
- Valid from
- Jul 31, 2026
- Valid until
- Feb 6, 2027 (132 days remaining)
- Public key
- EC 384-bit
- Serial
- 5AE59859B7EDC137B0A5E2819BBE904A
- SHA-256 fingerprint
- F4:B4:2B:4E:12:4C:4B:A2:1B:60:36:E2:CE:4A:42:AE:B4:9D:61:CF:F1:BB:3E:9F:B7:1B:04:74:1D:2B:97:56
- Chain
- nazwaSSL DV TLS G2 E29 CA → Certum EC-384 CA → Certum Trusted Network CA
Certificate Authority Authorization (CAA)
CAA restricts issuance to certum.pl, letsencrypt.org; we couldn't map the serving CA (nazwa.pl Sp. z o.o.) to one of these identifiers.
Never get surprised by dc-sa.pl's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch dc-sa.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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