Q1 What is the difference between the All Zips and Developer Versions
A1. The Developers Version is an All Zips version with full exporting functionality.
Q2. What is a 3 digit zip code prefix? 
A2. A 3 digit zip code prefix is the first 3 digits of a zip code. For example Zip Code Prefix 606 contains all 5 digit zip codes that start of 606.