A base station device may include a processor configured to select one or more anchor Narrow Band Internet of Things (NB-IoT) channels in a frequency band based on frequencies consistent with a user equipment (UE) device raster scan and assign a plurality of supplementary NB-IoT channels in the frequency band based on frequencies aligned with Physical Resource Blocks (PRBs) of the frequency band. The base station may further include a transceiver configured to broadcast information identifying the one or more NB-IoT channels and the plurality of supplementary NB-IoT channels in a system information block (SIB).