Sub Demo()
Application.ScreenUpdating = False
Dim StrTxt As String
StrTxt = "|"
With ActiveDocument.Range
  With .Find
    .ClearFormatting
    .Replacement.ClearFormatting
    .Text = "[0-9]{3}+[0-9]{3}-[0-9]{4}"
    .Replacement.Text = ""
    .Forward = True
    .Wrap = wdFindStop
    .Format = False
    .MatchWildcards = True
    .Execute
  End With
  Do While .Find.Found
    If InStr(StrTxt, .Duplicate.Text) = 0 Then StrTxt = StrTxt & .Duplicate.Text & "|"
    .Collapse wdCollapseEnd
    .Find.Execute
  Loop
End With
With ActiveDocument.Range
  .InsertAfter Replace(StrTxt, "|", vbCr)
  .Characters.Last.Delete
End With
Application.ScreenUpdating = True
End Sub