The unearthed documents contain many prefectures and counties in sixteen states period that have been lost in the handed down literatures. They are to be found among the records of local officials and titles of nobility, and are helpful for the study of the evolution and changes of the establishment of administrative regions in different countries at that time. This is a supplementary research for A General History of China's Administrative Divisions, the Sixteen States in the Northern Dynasty. Using these documents, and other partial handed down materials, 68 administrative divisions from 11 regimes have been identified, including the later Zhao, former Liang, former Yan, former Qin, later Yan, later Qin, western Qin, later Liang, western Liang and northern Liang. The 68 divisions include 4 prefectures, 1 town (zhen), 18 counties (jun), 2 towns (hujun) and 43 counties (xian). This study also provides information on supplement questions such as the movement of seat of Pingzhou in the later stage of former Yan, the duration of existence of Lelang County, the hierarchical position of Wushi County and Chongquan County, the nature of Youzhou County in the later Qin and Wuwei County in the western Qin, the hierarchical position of Jinzei County in the later Liang, the true and false of Yong'an County and the hierarchical position of Wansui County in the Northern Liang, etc.