context: Although the period of this historical kingdom dates from the fourth to twelfth centuries, it is frequently mentioned. Ancient and medieval historians refer to this as Kamrup. After the expiration of the kingdom of Kamrup, it is mentioned in the Muslim texts called Kamru or Kamrud. According to Kalika Purana and Suanchang, the western border of this state was the Karatoya River and formerly Darkarbasi Temple near Sadia [1]. The Burman dynasty, the Mleccha dynasty and the Pala dynasty ruled till the twelfth century, after which the Khen dynasty moved the capital further west and renamed the kingdom Kamta. So the existence of the kingdom of Kamrup ended with the fall of the Pala kings in the twelfth century.
question: What is the time limit of Kamrup state?