Here we would like to draw your attention to WLBC1 transaction code in SAP. As we know it is being used in the SAP SD-POS (POS Interface in SD) component which is coming under SD module (Sales & Distribution).WLBC1 is a transaction code used for Number ranges for collective numbers in SAP.
It comes under the package WFWW.
Transaction WLBC1 technical data table
|Purpose||Number ranges for collective numbers|