What is responsible for assigning IP addresses to network administrators?

IP addresses are typically assigned to network administrators by the internet Assigned Numbers Authority (IANA) and regional internet registries (RIRs) such as ARIN, RIPE NCC, and APNIC. These organizations allocate blocks of IP addresses to Internet Service Providers (ISPs) and large organizations based on their needs. Network administrators then assign specific IP addresses from these allocated blocks to devices within their local networks. In smaller networks, administrators may also use Dynamic Host Configuration Protocol (DHCP) servers to automate the assignment of IP addresses to devices.