Zipcodes that start with zero are no recongized / do not show up in loads or on rate cons. Any driver info (truck, trailer numbers) that start with zero are not recognized either. This is needed for tracking system that use all digits for identify their units. ie (Samsara needs all digits to find a specific unit. If they truck number is 0160, there are other unit that could be 00160, 160, 010160...)