The Silent 400 years:
Amos 8:11 “Behold, the days are coming,’ declares the Lord, ‘when I will send famine on the land –not a famine of bread, nor a thirst for water, but of hearing the words of the Lord”
Micah 3: 4-8 “Then they will cry to t…he Lord, but he will not answer them; he will hide his face from them at this time, because they have made their deeds evil. Thus says the Lord concerning the prophets who lead my people astray, who cry ‘Peace” when they have something to eat, but declare war against him who puts nothing into their mouths. Therefore it shall be night to you, without vision, and darkness to you, without divination. The sun shall go down on the prophets, and the day shall be black over them; the seers shall be disgraced, and the diviners put to shame; they shall all cover their lips, for there is no answer from God. But as for me, I am filled with power, with the Spirit of the Lord, and with justice and might, to declare to Jacob his transgression and to Israel his sin.”
There was no prophecy between that of Malachi and its fulfilment 400 years later, as prophesied by Amos and Micah centuries earlier. The Micah reference states the divine origin of prophecy, showing that anyone claiming to prophecy is claiming their speech carries the same divine inspiration as scripture therefore anyone claiming prophecy during the silent 400 years is a false prophet.
Malachi 4:5 “Behold. I will send you Elijah the prophet before the great and awesome day of the Lord comes”
Luke 1:17 “And he will turn many of the children of Israel to the Lord their God, and he will go before him in the spirit and power of Elijah, to turn the hearts of the fathers to the children, and the disobedient to the wisdom of the just, to make ready for the Lord a people prepared”
The silent yers ended when the above prophecy of Malachi was fulfiled, at the time that God had specified (Galatians 4:4)