TCP 41 Graphics
TCP 42 Host Name Server
TCP 43 WhoIs
TCP 44 MPM FLAGS Protocol
TCP 45 Message Processing Module [recv]
TCP 46 MPM [default send]
TCP 47 NI FTP
TCP 48 Digital Audit Daemon
TCP 49 Login Host Protocol (TACACS)
TCP 50 Remote Mail Checking Protocol
TCP 51 IMP Logical Address Maintenance
TCP 52 XNS Time Protocol
TCP 53 Domain Name Server
TCP 54 XNS Clearinghouse
TCP 55 ISI Graphics Language
TCP 56 XNS Authentication
TCP 57 any private terminal access
TCP 58 XNS Mail
TCP 59 any private file service
TCP 60 Unassigned