The site for archaeological research at Pattanam (10°09.434’N; 76°12.587’E) covers about 45 hectares. Due to habitation activities it is a "disturbed" site; some parts are partially destroyed due to sand quarrying. The site seems to have been first occupied by indigenous population around 1000 BC and continued to be active till the 10th century AD. The AMS 14C analysis of the charcoal and wood samples from the Iron Age layer and wharf contexts have determined their antiquity as first millennium BC.