The following table lists the type codes for protocols.
| Type code | Protocol |
| 001 | appletalk |
| 002 | auth |
| 003 | bgp |
| 004 | cdp |
| 005 | clns |
| 006 | dhcp |
| 007 | dns |
| 008 | finger |
| 009 | ftp |
| 010 | hsrp |
| 011 | http |
| 012 | icmp |
| 013 | igmp |
| 014 | igrp/eigrp |
| 015 | ipv6 |
| 016 | ipx |
| 017 | irc |
| 018 | is-is |
| 019 | isakmp/ike |
| 020 | ldap |
| 021 | mpls |
| 022 | ms-rpc |
| 023 | ms-sql |
| 024 | nat |
| 025 | netbios |
| 026 | nntp |
| 027 | ntp |
| 028 | oracle (sqlnet, etc.) |
| 029 | ospf |
| 030 | pop/imap |
| 031 | portmapper |
| 032 | qos |
| 033 | rip |
| 034 | rpc services |
| 035 | smb |
| 036 | smtp |
| 037 | snmp |
| 038 | sql |
| 039 | ssh |
| 040 | ssl/tls |
| 041 | tacacs |
| 042 | tcp (generic) |
| 043 | telnet |
| 045 | udp (generic) |
| 046 | uucp |
| 048 | x-window |
| 049 | tftp |
| 050 | IP |
| 051 | nfs |
| 052 | wins |
| 080 | h.323 (voip) |
| 081 | megaco (voip) |
| 082 | mgcp (voip) |
| 083 | sip (voip) |
| 084 | rtp/rtcp (voip) |
| 099 | voip (other) |
| 100 | aim (IM) |
| 101 | msn (IM) |
| 102 | yahoo! (IM) |
| 103 | icq (IM) |
| 119 | IM (other) |
| 120 | musicMatch |
| 121 | winamp |
| 122 | shoutcast |
| 123 | windows media |
| 124 | quicktime |
| 125 | rtsp |
| 149 | streaming media (other) |
| 150 | bittorrent |
| 151 | blubster/piolet/rockitnet |
| 152 | directconnect |
| 153 | earthstation5 |
| 154 | edonkey/overnet/emule/mldonkey |
| 155 | fasttrack |
| 156 | gnutella |
| 157 | twister |
| 158 | winmx |
| 180 | p2p (other) |
| 190 | DNP3 (SCADA) |
| 191 | ICCP (SCADA) |
| 192 | IEC (SCADA) |
| 193 | MODBUS (SCADA) |
| 194 | OPC (SCADA) |
| 199 | SCADA (other) |
| 254 | Multi-protocol |
| 255 | Other Protocol |