Fact Sheets
12/16/2025
Addressing Fact Sheet for First-Class Flats

This document is for mailers who are sending flat-size mail (such as large envelopes) at Automation and Presorted First-Class Mail prices. To use these prices, you must mail at least 500 pieces at a time, prepared and sorted according to Postal Service guidelines.

Announcements
12/15/2025
INFORMATIONAL - USPS Ship (PPC) Services – INCIDENT 10260246
Data Files
12/15/2025
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
12/15/2025
City/State ZIP Code Weekly Compare
Data Files
12/15/2025
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
Data Files
12/15/2025
AIS Congressional District File (CONG_DIST.TXT)
Data Files
12/15/2025
AIS County Name Table Layout (AISCNTY.TXT)
Data Files
12/15/2025
AMS County Name Table (COUNTY_NAME_TABLE.TXT)
Contact Lists
12/15/2025
AMS Address Report: AISU Mailing List (ADDRREPT.TXT)
Data Files
12/15/2025
AISU ZIP Code Record and AISU Address Record Descriptions (AISULOUT.TXT)