def return_npc(mcc, mnc):
    """
    Format MCC and MNC into a NPC.

    :param mcc: Country code.
    :type mcc: int

    :param mnc: Network code.
    :type mnc: int
    """
    return "{0}{1}30".format(str(mcc).zfill(3), str(mnc).zfill(3))