Endpoint:
geo.thx.dog
Returns:
{"success":true,"ip":"216.73.217.42","geo":"Columbus, Ohio
United States 43215"}

Endpoint:
geo.thx.dog?callback=func
Returns:
func({"success":true,"ip":"216.73.217.42","geo":"Columbus, Ohio
United States 43215"});

Endpoint:
geo.thx.dog/xx.xx.xx.xx
Returns:
func({"success":true,"ip":"xx.xx.xx.xx","geo":"Geo Here"});

Endpoint:
geo.thx.dog/xx.xx.xx.xx?callback=func
Returns:
func({"success":true,"ip":"xx.xx.xx.xx","geo":"Geo Here"});