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The first Inca was Manco Capac, he was the one who had found the legendary Cusco.
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By 1350, during they Inca Roca, they had conquered all areas that were close to Lake Titicaca in the south as well as the valley to the immediate east of Cusco
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In 1463, Pachacuti's son, Topa Inca, pushed the conguest into many different countries and also overwhelmed the coastal kingdom of Chimor
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The final Inca extension was farther to the north, as in 1525 the frontiers reached Rumichaca, a natural bridge over the Ancasmayo River. Which now marks either more or less boundaries between Ecuador and Colombia