The present invention relates to systems and methods for best server selection for real-time data transmission are provided. The systems and methods include an access controller, and an application which receives information of a selection of several best servers with which to transmit real-time packets to. The application sends a request to the access controller for server information before call initiation. The access controller identifies servers with the same ISP, and then selects a regional server within this group of same ISP servers. Subsequently the geo optimizer identifies servers closest to the application from among the regional servers. The respective loads of each of the closest servers are analyzed to select only servers that are likely to provide satisfactory quality of service. A monitor within the central IDC is able to measure load conditions of each server and provide this load information to the access controller.