Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
How it was found that the Dao hackers used shapeshift?
In a more practical exemple, how to find that 13qCK9VzJCicXeh47W59rh7A6tfun92Sr5 belongs to https://www.blockchain.com using only block explorer data?
There is no guaranteed way to check.
In most investigations, it is a combination of tracing the money to known addresses (most exchanges and companies consolidate funds into a handful of hot and cold wallets), and exchanges volunteering/sharing information when served with warrants.
Required, but never shown