http://www.rfc-editor.org/rfc/rfc1700.txt
RFC 1700: Assigned Numbers, J. Reynolds, J. Postel1994-10-01T23:00:00-00:00This RFC is a snapshot of the ongoing process of the assignment of protocol parameters for the Internet protocol suite. To make the current information readily available the assignments are kept up-to- date in a set of online text files. This memo is a status report on the parameters (i.e., numbers and keywords) used in protocols in the Internet community.