Announcements
12/29/2025
INFORMATIONAL: USPS APIs System Deployment - January 10, 2026
Data Files
12/29/2025
Labeling List Changes Effective February 1, 2026

Effective February 1, 2026, the Postal Service™ will revise Labeling List(s) L002, L005, L012, L016, L051, L201, and L606 to reflect changes in mail processing operations. Mailers are expected to label according to these revised lists for mailings inducted on or after the February 1, 2026, effective date through March 31, 2026, expiration date. The changes will be published in the Postal Bulletin, Issue #22694.

Data Files
12/29/2025
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
12/29/2025
City/State ZIP Code Weekly Compare
Data Files
12/29/2025
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
Data Files
12/29/2025
AIS Congressional District File (CONG_DIST.TXT)
Data Files
12/29/2025
AIS County Name Table Layout (AISCNTY.TXT)
Data Files
12/29/2025
AMS County Name Table (COUNTY_NAME_TABLE.TXT)
Contact Lists
12/29/2025
AMS Address Report: AISU Mailing List (ADDRREPT.TXT)
Data Files
12/29/2025
AISU ZIP Code Record and AISU Address Record Descriptions (AISULOUT.TXT)