What is the difference between an allocation and an assignment?
An allocation is the address space that the RIPE NCC sets apart for an LIR’s future use.
RIPE NCC ⇨ LIR
An assignment is address space taken by an LIR from their allocation and given to an End User or used in the LIR’s own infrastructure.
LIR ⇨ End User or LIR ⇨ itself
LIR’s Allocation e.g : /19