A Private IP Address Range refers to specific sets of IP addresses that are reserved for use within private networks. These addresses are not routable on the public internet, meaning they can only be used within local networks, such as home or office environments. The main ranges designated for private use are 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and 192.168.0.0 to 192.168.255.255. Devices within a private network can communicate with each other using these private IP addresses, while a single public IP address is often used to connect to the internet. This setup enhances security and conserves the limited number of available public IP addresses. Routers typically manage the translation between private and public IP addresses using a method called Network Address Translation (NAT).