Over the years the amount of letter, documents packages and products carried by courier companies has come to be larger and bigger. As the volume and speed of delivery has increased it became essential to supply customers with an idea of where his or her parcel was in the delivery circuit. A USPS tracking number answered this need by permitting USPS to give clients accurate important information of the place of a package at whatever specific time on its trip to delivery. It was mostly with the introduction of advanced information technology that tracking and more especially USPS tracking became possible. Most big courier service providers such as FedEx, DHL, PostNet, Aerospeed Couriers and TNT also use similar tracking numbers. USPS tracking numbers are given at the place of entry of the letter, document or package at the UPS centre. The USPS tracking number used for domestic packages in the USA, normally has the prefix ‘IZ’ that is subsequently followed by a six character shipper number. The six figure shipper number is made up of numbers and characters. After the IZ and shipper number another couple of numbers follow to alert the shipper to the mode of transport example. for the surface transportation the number would be 03, while for United States following day air for very early Saturday morning delivery this number might be forty-one. In total USPS tracking utilizes twenty-two such codes giving the shipper an idea of the mode and transportation requirements. The USPS tracking number does not end with these two figures. To complete the USPS tracking number needs a further eight numbers. Thus the USPS shipping number includes a total of eighteen characters. Customers have been offered a variety of services that have improved USPS tracking. A USPS client can get text messages to his or her mobile phone . They can also forward a text message informing the service where they might be for delivery if they won’t be at home for a particular delivery.
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