Hi b0x4it,
Word doesn't really have a page-level definition, though it is possible to obtain a page range for processing. A simpler approach is to just select the range you're interested in (could be as little as a single word, or might span two or more pages) and run a macro like the following:
Code:
Sub MMD_MakeSelectedReferencesToJustNumber()
On Error Resume Next
Dim oFld As Field
For Each oFld In Selection.Fields
With oFld
If .Type = wdFieldRef Then
With .Code
If InStr(.Text, "\# 0;0") = 0 Then .Text = Replace(.Text, " \h", " \# 0;0 \h")
End With
.Update
End If
End With
Next oFld
End Sub