INFORMATIONAL - Executive Retirement - Sharon Owens

USPS PTR2 API Known Issues

Automated Zone Indicator (AZI) Table

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:

1. Two Pass Zones: Automated two-step sector/segment at mail processing facilities
2. 876 Carrier Route Sort Zones: Automated incoming secondary carrier route sorting at plants
3. Carrier Route Barcode Sorter (CSBCS) Zones: Automated walk sequence sorting on CSBCS machines at delivery units
4. Delivery Barcode Sorter (DBCS) Zones: Automated walk sequence sorting on DBCS machines at plants [i.e., sectional center facilities (SCFs)] or at delivery units
5. Manual/Mechanized Zones: No automated sorting; no tracking code scans should be generated from facilities matched to these ZIP Codes

DELIVERY - WestPac Area - ID-MT-OR District - Office Temporarily Closed - North Bend Post Office

INFORMATIONAL - USPS APIs System Deployment April 18, 2026

INFORMATIONAL - USPS APIs System Deployment April 12, 2026

PTR2 Release Notes_DD_04_02_26