def normalize national_number
      clean! national_number
      normalized = @codes.reduce national_number do |number, code|
        result = code.normalize number
        break result if result
        number
      end
      normalized
    end
def normalize national_number
      clean! national_number
      normalized = @codes.reduce national_number do |number, code|
        result = code.normalize number
        break result if result
        number
      end
      normalized
    end
Removes 0s from partially normalized numbers
 such as 410443643533.

 Example:
   410443643533 -> 41443643533

 In some cases it doesn't, like Italy.