Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT)

3 Digit ZIP/AISU Office List (AISUREPT.TXT)

Z4 Info File

A downloadable ZIP file containing information related to the Z4 Info File

Sample Z4CHANGE File TXT

This document provides a sample of a Z4CHANGE .txt file.

Sample Z4CHANGE File TXT

This document provides a sample of a Z4CHANGE .txt file.