Sources in the Directorate General of Income Tax (Investigation) department told PTI that of the 627 individuals named in the list, 235 were based in the city.
"We have got confirmation of the accounts of about 90 individuals from Swiss authorities and will begin the process of ascertaining it any criminality was involved," sources said.
Maintaining that just because somebody had a foreign account he cannot be categorised as "blackmoney hoarder", an officer said, "We will verify all the aspects."
The list includes people from several fields, including politicians, real estate developers and bullion traders.
Complying with its directions, the Centre today gave to the Supreme Court a list of 627 Indians who have accounts in HSBC bank, Geneva, in which tax probe for suspected blackmoney has to be completed by March next year.