According to historian and geographer K. Iswara Dutt, Kammanadu consisted of the Narasaraopet, Sattenapalle, Bapatla and Ongole taluks, including the villages of the Addanki area.
It was bounded by Srisailam in the west, Palnadu and Velanadu in the north, the Gundlakamma River in the south and the Bay of Bengal in the east.
[6] Between the seventh and thirteenth centuries AD, Kammanadu was ruled by a branch of the Telugu Cholas with their capital at Konidena (which is now a small village).
A reference to Karmarashtram appears in the inscriptions of the Ikshvaku king Madhariputra Purushadatta (3rd century A.D) found at Bethavolu (Jaggayyapeta).
[citation needed] In the inscriptions ascribed to period from the 3rd to the 11th century AD, the words Kammarashtram, Kammaratham, Kammakaratham, Karmarashtram, Karmakaratham, Karmakarashtram and Kammakarashtram were used interchangeably.