A system and method for automatic IP address range allocation is provided. The system and method include a) storing an availability map of IP addresses including a pointer to a next available IP address range of a first size, b) receiving, from a requestor computer device, a request for an IP address range of the first size, c) selecting the next available IP address range of the first size based on the pointer, d) moving the pointer to another available IP address range of the first size, e) placing the selected IP address range of the first size in a quarantine pool, and f) transmitting, to the requestor computer device, the selected IP address range of the first size.