Project Zip Code (PZC) is a secure program that counts your credit union members and matches them by congressional district, state legislative district and county. These numbers are uploaded to CUNA’s Project Zip Code national database and combined with numbers nationwide. The member totals are then transmitted for use of the PZC national website, www.pzconline.com. This data aids in federal and state advocacy efforts, and is useful to credit unions interested in ATM expansion or shared branching.