What's the difference between an assigned and allocated IP range? I'm parsing RIR Statistics Exchange files (e.g. see http://www.apnic.net/publications/media-library/documents/resource-guidelines/rir-statistics-exchange-format) and they define "assigned" and "allocated" IP address blocks.
Are assigned blocks being actively used, and allocated are not used by reserved? In other words, no machine in the world will use an allocated IP address until it becomes and assigned IP address? That is to say, an allocated IP address is reserved for use but is not in use?