1. In Query, create a new query for the specific record type
  2. Filter on Last Name
  3. Select an Operator of Begins With
  4. For the Value enter [*-*] (including the brackets and replacing * with the appropriate letters)
    For example, to find all individuals whose last names begin with the letters a through d, enter [a-d] as the value.
For more information, refer to How to use wild cards in query (BB44191)