FAQs
11/17/2025
Modernization of Address & NCOA Processing with APIs - Q & A
Release Notes
11/17/2025
USPS APIs Release Notes

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

FAQs
11/17/2025
USPS Ship Frequently Asked Questions

USPS Ship Frequently Asked Questions

Data Files
11/17/2025
***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT)
Data Files
11/17/2025
City/State ZIP Code Weekly Compare
Data Files
11/17/2025
3 Digit ZIP/AISU Office List (AISUREPT.TXT)
Data Files
11/17/2025
AIS Congressional District File (CONG_DIST.TXT)
Data Files
11/17/2025
AIS County Name Table Layout (AISCNTY.TXT)
Data Files
11/17/2025
AMS County Name Table (COUNTY_NAME_TABLE.TXT)
Contact Lists
11/17/2025
AMS Address Report: AISU Mailing List (ADDRREPT.TXT)