On February 3 , 1870 , the amendment reached requisite number of state ratifications ( then 27 ) .
On February 3 , 1870 , the amendment was certified as the Fifteenth Amendment to the United States Constitution .
On February 3 , 1870 , the amendment reached requisite number of state ratifications ( then 27 ) and was certified as the Fifteenth Amendment to the United States Constitution .