Library /sys$common/syshlp/ncphelp.hlb SET, MODULE, X25-SERVER, DESTINATION dest-name, SUBADDRESSES range  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Specifies the range of local DTE subaddresses that identify the
 destination for the incoming call. Range consists of one or two
 subaddresses.  The subaddress is a decimal integer in the range 0
 to 9999. See the Public Network Information manual for the
 maximum length of the subaddress for your network.  Separate two
 subaddresses with a single hyphen to indicate  a range. The
 second subaddress must be greater than the first.  By default, no
 subaddress range is used.