ZP4 versus MAF

--- ZP4 --- --- MAF ---
Commercial product Free
Proprietary Postal Service data Open public data
Address ranges Individual addresses
Address list generation prohibited MAF is an address list
Tiger line endpoints only Address latitude and longitude
Mailing addresses only Supports any physical address
Street aliases listed Aliases supported, but not yet included
Residence vs. business detection Also marks "mixed" buildings
Generates CASS form 3553 Forms 3600 and 3602 only
Territories and overseas military 50 states and District of Columbia only
PO boxes and rural routes Physical addresses only