Determining range for dynamic table

How do I determine the table range for a table with varying number of columns. I will always have a set number of rows, but the number of columns will vary. The following code creates my columns.

With Range("B9")
        .Value = Range("B6").Value
        .DataSeries Rowcol:=xlRows, Type:=xlChronological, Date:=xlMonth, Step:=1, Stop:=Range("B7").Value
    End With

I will always have 9 rows, but I do not know how many columns. I would like to figure out the range.