| Domain Name Services
|| IANA manages the DNS Root Zone (assignments of ccTLDs and gTLDs) along with other functions such as the .int and .arpa zones.
| Number Resources
|| IANA coordinates allocations from the global IP and AS number spaces, such as those made to Regional Internet Registries.
| Protocol Registries
|| IANA is the central repository for protocol name and number registries used in many Internet protocols.