What is the largest TCP/IP network port number allowable for IPv4

浏览数：28 / 时间：2015年06月09日
69 down vote

The largest port number is an unsigned short 2^16-1: 65535

A registered port is one assigned by the Internet Corporation for Assigned Names and Numbers (ICANN) to a certain use. Each registered port is in the range 1024–49151.

Since 21 March 2001 the registry agency is ICANN; before that time it was IANA.

Ports with numbers lower than those of the registered ports are called well known ports; port with numbers greater than those of the registered ports are called dynamic and/or private ports.

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up vote 34 down vote

As I understand it, you should only use up to 49151, as from 49152 up to 65535 are reserved for Ephemeral ports

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