Anūpapati(Anupapati) is a kingdom located on the seashore. The king of this land, named Sudarśana (Sudarsana), was present when Yudhiṣṭhira(Yudhishthira) entered the court after the Rājasūya Yajña (Rajasuya Yajna).

Mahābhārata (Kinjawadekar)(2.4.28)
Mahābhārata Vols. 1-43 (Siddhāntabāgīśa)(2.4.9 (footnote 10.8, p. 26))