While I don't believe this type of thinking about IP addresses represents a sustainable approach to an open internet, https://www.maxmind.com/en/geoip2-anonymou

While I don't believe this type of thinking about IP addresses represents a sustainable approach to an open internet, https://www.maxmind.com/en/geoip2-anonymous-ip-database https://www.maxmind.com/en/geoip2-anonymous-ip-database and/or https://www.maxmind.com/en/proxy-detection-service https://www.maxmind.com/en/proxy-detection-service may be what you are looking for.