PostNet
PostNet codes are the clocked codes used in the US mail system. There are three types of PostNet code (identified as A, C and C’), which differ in the number of characters encoded. These codes are based on the US ZIP code system plus a Mod 10 checkdigit.
PostNet A
The dBarcode library also allows the creation of the US postal FIM symbols – FIM A, FIM B and FIM C. There is no text content associated with these codes.
PZN