Here we would like to draw your attention to OYC4 transaction code in SAP. As we know it is being used in the SAP BC-SRV (Basis Services / Communication Interfaces in Basis) component which is coming under BC module (BASIS).OYC4 is a transaction code used for C T005K country dialling code in SAP.
It comes under the package SKOA.
Transaction OYC4 technical data table
|Purpose||C T005K country dialling code|