LIR is a structural part of RIR.
RIR (regional internet registry) – regional Internet registry. In short, allocates large blocks of addresses, registers LIRs, and allocates ASs.
LIR (local internet registry) – local Internet registry. In short, responsible for keeping the network up and running, allocating PIs and AS numbers. ISP. BAP (address space) LIR from – 4096 IP addresses.
At the head of the department is the structure of the IANA (Internet Assigned Numbers Authority) Internet registry system, which distributes Internet number resources from the central pool to 5 RIRs, and then to the LIR or LIR. That is, IANA allocates public Internet ARs to regional registries (RIRs) according to their identified needs.
Schematically, the space division path looks like this:
IANA -> RIR -> LIR (-> end customer) [-> PI owner -> end customer].