Из ОС Linux, где есть список нортов, зарезервированных для основных служб.

#

# Network services. Internet style

#

# Note that it is presently the policy of IANA to assign a single well-known

# port number for both ICP and UDP, hence, most entries here have two

# entries even it the protocol doesn't support UDP operations.

# Updated from RFC 1340, "Assigned Numbers" (July 1992). Not all ports

# are included, only the more common ones.

#

# from: ia(s)services5.8 (Berkeley) 5/9/91

# $ld: services,v 1.9 1993/11/08 19:49:15 cgd Exp $

#

tcpmux 1/tcp ff TCP port service multiplexer

echo 7/tcp

echo 7/udp

discard 9/tcp sink null

discard 9/udp sink null

systat 11/tcp users

daytime 13/tcp

daytime 13/udp

netstat 15/tcp

qotd 17/tcp quote

mspIB/tcp ff message send protocol

nisp18/udp и message send protocol

chargen 19/tcp ttytst source

chargen 19/udp ttytst source

ftp21/tcp