Downloadable files containing contact information for Address Management Systems. Resources AISU Contact Information (AISUADDR.TXT) AISU ZIP Code File (AISUZIPS.TXT) AISU ZIP Code Record and AISU Address Record Descriptions (AISULOUT.TXT) ***Updated - New Areas*** - Area District 5-digit ZIP Codes (AREADIST_ZIP5.TXT) Area/District 3-digit and 5-digit ZIP Code Assignments (AREA_DIST_ZIP.TXT) 3 Digit ZIP/AISU Office List (AISUREPT.TXT) AMS Address Report: AISU Mailing List (ADDRREPT.TXT) AMS County Name Table (COUNTY_NAME_TABLE.TXT) AIS County Name Table Layout (AISCNTY.TXT) AIS Congressional District File (CONG_DIST.TXT)