Two syntax options are available:
  1. Dash Syntax:
curl -x https://network.joinmassive.com:65535 \
-U '{USERNAME}-country-US-subdivision-CA:{PASSWORD}' \
https://cloudflare.com/cdn-cgi/trace
  1. Query String Syntax:
curl -x https://network.joinmassive.com:65535 \
-U '{USERNAME}?country=US&subdivision=CA:{PASSWORD}' \
https://cloudflare.com/cdn-cgi/trace
Learn more at Geotargeting documentation