Announcements
03/30/2026
INFORMATIONAL - USPS APIs System Maintenance April 15 Release
FAQs
03/30/2026
USPS PTR2 API Known Issues
Data Files
03/30/2026
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
03/30/2026
City/State ZIP Code Weekly Compare
Data Files
03/30/2026
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
Data Files
03/30/2026
AIS Congressional District File (CONG_DIST.TXT)
Data Files
03/30/2026
AIS County Name Table Layout (AISCNTY.TXT)
Data Files
03/30/2026
AMS County Name Table (COUNTY_NAME_TABLE.TXT)
Data Files
03/30/2026
AMS Address Report: AISU Mailing List (ADDRREPT.TXT)
Data Files
03/30/2026
AISU ZIP Code Record and AISU Address Record Descriptions (AISULOUT.TXT)