As Amazon has moved from Fulfillment by Amazon to its own fleet of delivery trucks, it has also added its own carrier facilities. Amazon has one of the largest and most sophisticated logistics operations in the world. It uses advanced technology to move products and orders efficiently.
Amazon has warehouse locations close to many population centers in the U.S. Therefore, your Amazon order might go straight from the warehouse to your door without a stop at a carrier facility. This enables Amazon to provide next-day, and sometimes even same-day, delivery.