TCP/UDP port number ranges
There are three ranges:
Well-known ports: 0 to 1023
Registered ports: 1024 to 49151
Dynamic and/or private ports: 49152 to 65535
For more information, including a listing of UDP/TCP port numbers, go to the Internet Assigned Numbers Authority (IANA) website at: www.iana.org.
Click on:
Protocol Number Assignment Services
P (Under "Directory of General Assigned Numbers" heading)
Port Numbers