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Networking Fundamentals · Foundational

Registered Ports

Ports 1024-49151, which IANA registers for specific applications and vendors on request.

Definition

Registered or user ports are used by services such as RDP (3389), MySQL (3306), Microsoft SQL Server (1433), SIP (5060) and RADIUS (1812). Registration documents intended use but does not prevent other software from using the port.

Example

RDP uses registered port TCP 3389.

Exam tip

Many "well-known" exam ports, such as 3389 and 1433, are technically in the registered range.

Related terms