A128 is a standard SAP Table which is used to store Service Agent/TariffZoneDep/TariffZoneDest/ShippingMatType data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The A128 table consists of various fields, each holding specific information or linking keys about Service Agent/TariffZoneDep/TariffZoneDest/ShippingMatType data available in SAP. These include KAPPL (Application), KSCHL (Condition type), TDLNR (Number of forwarding agent in the shipment stage), TRFZNA (Tariff zone of point of departure)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .