The AZI table lists each five-digit ZIP Code™ and is an indicator of the type of processing that typically takes place on letter mail destined for each ZIP Code. Each number in the file is a ZIP Code appended with a numeric zone indicator. The five numeric indicators are as follows: Two Pass Zones: Automated two-step sector/segment at mail processing facilities876 Carrier Route Sort Zones: Automated incoming secondary carrier route sorting at plantsCarrier Route Barcode Sorter (CSBCS) Zones: Automated walk sequence sorting on CSBCS machines at delivery unitsDelivery Barcode Sorter (DBCS) Zones: Automated walk sequence sorting on DBCS machines at...
