Colombia Anonymous Proxy
Please note that due to the fact that these proxy servers are free they do not last very long.
Updated and tested on August 26, 2016
An anonymous open proxy allows users to conceal their IP address while browsing the Web or using other Internet services.
Even thought anonymous proxy does not reveal your IP address it does not hide the fact that communication via proxy is being used. The server could identify that connection was made via proxy if fields like HTTP_X_VIA, HTTP_X_FORWARDED_FOR, HTTP_VIA, HTTP_FORWARDED, HTTP_PROXY_CONNECTION are present in HTTP header.
Use elite proxy if you want to hide behind proxy completely.