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 nek.ua
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- nek.ua
- Valid from
- Aug 2, 2022
- Valid until
- Oct 31, 2022 (expired 1365 days ago)
- Public key
- EC 384-bit
- Serial
- 0440BBC7E83F2B63ABEAD64E4047F09DF37E
- SHA-256 fingerprint
- C2:95:14:39:F5:19:72:23:51:AF:30:D0:9A:B9:57:01:A5:21:9C:2D:61:07:AF:F9:FA:64:A6:9F:10:CC:A8:C6
- Chain
- R3 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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