Final answer:
The Regional Internet Registries (RIRs) receive IP addresses from IANA and allocate them to ISPs and some organizations.
Step-by-step explanation:
The organization or group of organizations that receives IP addresses from IANA and is responsible for allocating these addresses to ISPs and some organizations are the Regional Internet Registries (RIRs). The RIRs are responsible for managing and distributing IP addresses within their respective regions. There are five RIRs in the world: ARIN, RIPE NCC, APNIC, LACNIC, and AFRINIC.