def region_prefix(leading_zero = true)
      region_prefix = (rand(8) + 2).to_s + Faker.numerify( '#' * (rand(3) + 1) ).to_s
      region_prefix = '0' + region_prefix if leading_zero
      region_prefix
    end
def region_prefix(leading_zero = true)
      region_prefix = (rand(8) + 2).to_s + Faker.numerify( '#' * (rand(3) + 1) ).to_s
      region_prefix = '0' + region_prefix if leading_zero
      region_prefix
    end
Region prefixes are in range 02..09 with length of 3 to 5 digits