NETWORKING-PORT NUMBERS and SERVICES
Look in /etc/services OR
On Mon, 03 Jul 2000, Kurt Wall cast these pearls:
The mother lode of assigned numbers lives at IANA. Formerly documented in RFC 1700, you can see them online at http://www.iana.org/numbers.html.
From: Bruce S.
An easier site for quick reference is: http://www.isi.edu/in-notes/iana/assignments/port-numbers