A156 is a standard SAP Table which is used to store Country of Departure/Destination Country/Del. Country data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The A156 table consists of various fields, each holding specific information or linking keys about Country of Departure/Destination Country/Del. Country data available in SAP. These include KAPPL (Application), KSCHL (Condition type), ALAND (Departure country (country from which the goods are sent)), LLAND (Country of Destination)... 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. .