We don't sell IP address pools (backed by hundreds and thousands of proxy ports). We sell individual mobile device proxy ports. A private proxy port is the only port on a mobile device, meaning you solely use the mobile operator's internet channel. A shared proxy port is one of the ports on a mobile device, meaning you share this internet channel with other users. At any given time, you have only 1 IP address. But it can be changed by rotation. The number of IP addresses available for rotation on a mobile device is uncertain as it depends on the country, region, operator, number of cell towers, and network settings, which change without the knowledge of mobile subscribers.