Why is the logfile full of source IPs which are mapped to the wrong countries?

I updated the GeoIP database to the latest today.

Recent entry is shown in the log like this:

This one shows it as being from .uk:

https://www.whois.com/whois/45.142.193.172

This one shows .nl:

https://www.shodan.io/host/45.142.193.172

And this one, .de:

https://whoisrequest.com/ip/45.142.193.172

I guess, it depends who you ask then as well it may show it differently :)

I am aware of proxying, VPNs etc.

Can you then specify the most precise tool to query where the IP is from?