Bank of Ceylon (BOC; Sinhala: ලංකා බැංකුව Lanka Bænkuwa|Tamil: இலங்கை வங்கி Ilangai Vangi) is a state-owned, major commercial bank in Sri Lanka. Its head office is located in an iconic cylindrical building in Colombo. The bank has a network of 628 branches, 689 automated teller machines (ATMs), 123 CDM network, and 15 regional loan centres within the country. It also has an around-the-clock call centre and an around the clock branch at its Colombo office.