RusLeaks founders suspended the Internet resource on Tuesday for publishing excessive personal information of Russians without their consent.
The authors of the RusLeaks project originally said the website was designed to counter "all-embracing corruption," which they said required revealing some personal details, but the government's communications watchdog said the project violated privacy.
"The website has been closed as it fails to fulfill its designated functions," the announcement on the website said.
All three RusLeak addresses - rusleaks.com, rusleaks.net, rusleaks.org - have been blocked.
The website contained passport numbers, phone numbers and information from the traffic police database, though dating mostly back to the 1999-2007 period, the federal communications watchdog said on Monday.