Commonly Used Ports -Part 3

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Port    TCP       UDP             DESCRIPTION

21   TCP   UDP    FTP control (command)
22   TCP   UDP    Secure Shell 
23   TCP   UDP    Telnet protocol—unencrypted text communications
24   TCP   UDP    Priv-mail : any private mail system.
25   TCP   UDP    Simple Mail Transfer Protocol 
26   TCP   UDP    Unassigned
27   TCP   UDP    NSW User System FE
29   TCP   UDP    MSG ICP
33   TCP   UDP    Display Support Protocol
35   TCP   UDP    Any private printer server protocol
37   TCP   UDP    TIME protocol
39   TCP   UDP    Resource Location Protocol
40   TCP   UDP    Unassigned
42   TCP   UDP    ARPA Host Name Server Protocol
42   TCP   UDP    Windows Internet Name Service
43   TCP   UDP    WHOIS protocol
47   TCP   UDP    NI FTP
49   TCP   UDP    TACACS Login Host protocol
50   TCP   UDP    Remote Mail Checking Protocol
51   TCP   UDP    IMP Logical Address Maintenance
52   TCP   UDP    XNS (Xerox Network Systems) Time Protocol
53   TCP   UDP    Domain Name System (DNS)
54   TCP   UDP    XNS (Xerox Network Systems) Clearinghouse
55   TCP   UDP    ISI Graphics Language (ISI-GL)
56   TCP   UDP    XNS (Xerox Network Systems) Authentication
56   TCP   UDP    Route Access Protocol (RAP)
57   TCP   UDP    any private terminal access
58   TCP   UDP    XNS (Xerox Network Systems) Mail
64   TCP   UDP    CI (Travelport) (formerly Covia) Comms Integrator
67   TCP   UDP    Bootstrap Protocol (BOOTP) Server; also used by DHCP
68   TCP   UDP    Bootstrap Protocol (BOOTP) Client; also used by DHCP
69   TCP   UDP    Trivial File Transfer Protocol (TFTP)
70   TCP   UDP    Gopher protocol
71   TCP   UDP    NETRJS protocol
72   TCP   UDP    NETRJS protocol
73   TCP   UDP    NETRJS protocol
74   TCP   UDP    NETRJS protocol
77   TCP   UDP    Any private Remote Job Entry
79   TCP   UDP    Finger protocol
80   TCP   UDP    Hypertext Transfer Protocol (HTTP)