Get a list of available cities

You can easily see which cities are available for targeting by requesting the following URL through the proxy: http://api.proxyrack.net/countries/us/cities

Example: 
curl -x usa.rotating.proxyrack.net:333 -U username http://api.proxyrack.net/countries/us/cities

Result: 

[
  "New York",
  "Cleveland",
  "Anchorage",
  "Los Angeles",
  "Miami",
  "Fort Lauderdale",
  "Buffalo"
]

You can then target a city by using this guide.