Methods, computer systems, and computer readable media provide for automated control of the status of network address space. Blocks of networking address space assigned to a network may be allocated from a free status to a new status based upon a request to allocate a particular size block. Blocks of networking address space assigned to a network that have been allocated to a new status may be deallocated to return to a free status based upon a request to deallocate the chosen block. Blocks of networking address space assigned to a network that have been allocated and otherwise manipulated such as through a lend from another network may be reclaimed for the original network upon a request to reclaim the chosen block.