From the developer: "The last ZIP Code management tool you need, ajmZip Manager will provide you with detailed information and demographics for each zip code area in the US. Longitude, latitude, time zone, demographics going back to 1980 - it's all here. Compute distances between zip codes and determine zip codes within a radius. Produce detailed maps using the TIGER Mapping Service. For owners of Microsoft MapPoint 2002, ajmZip Manager provides an interface that allows you to produce detailed maps by ZIP Code and by the US Census Bureau Zip Code Tabulation Area (ZCTA)."