Release Notes
04/22/2025
USPS APIs Release Notes

For the latest updates, please review the USPS APIs Release Notes.

Announcements
04/21/2025
INFORMATIONAL: Scheduled Commercial System Releases - April 23, 2025
Announcements
04/21/2025
INFORMATIONAL: USPS APIs System Deployment
Data Files
04/21/2025
City/State ZIP Code Weekly Compare
Data Files
04/21/2025
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
Data Files
04/21/2025
AIS Congressional District File (CONG_DIST.TXT)
Data Files
04/21/2025
AIS County Name Table Layout (AISCNTY.TXT)
Data Files
04/21/2025
AMS County Name Table (COUNTY_NAME_TABLE.TXT)
Contact Lists
04/21/2025
AMS Address Report: AISU Mailing List (ADDRREPT.TXT)
Data Files
04/21/2025
AISU ZIP Code Record and AISU Address Record Descriptions (AISULOUT.TXT)