According to IANA, what is the registered port range?

The registered port range, according to the Internet Assigned Numbers Authority (IANA), is from 1024 to 49151. This range is used for applications that are not as widely recognized as those associated with the well-known ports, which span from 0 to 1023. Registered ports allow non-system services to be registered for use by specific applications to avoid conflicts.

While the port ranges below and above this one serve different purposes, those ranges are classified differently: the well-known port range (0 to 1023) is allocated for specific, standardized protocols, and the dynamic or private port range (49152 to 65535) is often used for ephemeral ports assigned at run time by the operating system. The existence of a distinct registered port range helps maintain organization and prevents port conflicts in network communications.