What is "ashtakhu"

Ashtakhu (, also Romanized as Āshtākhū; also known as Eshtā Khān, Āshtākhūn, Eshtadkhūn, Eshtākhan, Eshtākhoon, Eshtākhūn, Eshtāqān, and Ishtākhūn) is a village in Kahshang Rural District, in the Central District of Birjand County, South Khorasan Province, Iran. At the 2006 census, its population was 136, in 31 families.