VMS Help TCPIP Services, Programming Interfaces, Sockets API, getservbyport()  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Gets information on the specified port from the network services
    database.
    Format
      #include  <netdb.h>
      struct servent *getservbyport  ( int port, char *proto );

  Additional Information (explode) :

• Arguments
• Description
• Return Values