Do NTP servers log ip addresses [closed]
It's not common for NTP servers to keep log data of requests from clients, although they can.
Computers configured to synchronize with certain NTP server aren't considered visitors as with web sites, because the setup is typically more permanent.
IP addresses aren't (necessarily) PII per GDPR, unless they are used as Online identifiers for profiling and identification (Recital 30). That would be highly unlikely with NTP, as there wouldn't even be point in profiling NTP users.