http://ip-api.com

https://ipstack.com

https://www.ip2location.com/{IP address}

https://wq.apnic.net/apnic-bin/whois.pl?searchtext={IP address}

Why do proxy IPs from Russia, Ukraine, the United States, etc. show IPs from other countries?

On the pages of the site it was noted more than once that we sell only our server proxies. And we ourselves prescribe their belonging to this or that country.
There are organizations (5 in total) that distribute IP by country (do not believe us, check on Wikipedia):
AFRINIC (Africa)
http://www.afrinic.net/ whois.afrinic.net
APNIC (Asia Pacific)
http://www.apnic.net/ whois.apnic.net
ARIN (Northern America)
http://www.arin.net/ whois.arin.net
LACNIC (Latin America and the Carribean)
http://www.lacnic.net/ whois.lacnic.net
Europe
https://www.ripe.net
Ideally, all GEO IP services should regularly update their data from these resources.
The problem is that everyone takes this information from different sources and at different intervals. Some people update their GEO databases regularly, while others do not for years. We are not in a position to be responsible for such services.
According to our observations as soon as possible updates GEO database service www.ip2location.com which collects databases from 5 regional Internet registrars, which are the standard.