There seems to be no change in `NextDNS`' response content when different http parameter `edns_client_subnet` values are received.
To enhance privacy, some people may want to pretend that they are in a country where privacy laws are strong. People in `Southeast Asia`, `China`, `Hong Kong`, and `Macau` may be willing to trade a little network delay in exchange for enhanced privacy.
EDNS Client Subnet (ECS) Guidelines: https://developers.google.com/speed/public-dns/docs/ecs
JSON API for DNS over HTTPS (DoH): https://developers.google.com/speed/public-dns/docs/doh/json#supported_parameters
This is what you guys needed!