user69216: Ethereum wallets can be associated with Exchanges (e.g. Etherscan.io will tell you if an address is a Poloniex one).
Is this possible for Bitcoin addresses?

user10353: Yes, in theory is possible to guess the ownership of an address to an Exchange.
Notice that I said in theory and I also mentioned that it's a guess. That's because per design each address is anonymous. However, since the blockchain is public, you can analyze the type and amount of transactions getting in and out a specific address and make assumptions based on patterns.
An exchange has generally a large amount of transactions. If they use a finite amount of addresses, eventually transactions will reuse existing addresses.
If you provide a tool or a way for people to publicly share/associate specific addresses with Exchanges, then eventually you will build an archive of matches. I believe this is what Etherscan does.

69216: <p>Ethereum wallets can be associated with Exchanges (e.g. Etherscan.io will tell you if an address is a Poloniex one).</p>

<p>Is this possible for Bitcoin addresses?</p>
 10353: <p>Yes, in theory is possible to guess the ownership of an address to an Exchange.</p>

<p>Notice that I said <em>in theory</em> and I also mentioned that it's a <em>guess</em>. That's because per design each address is anonymous. However, since the blockchain is public, you can analyze the type and amount of transactions getting in and out a specific address and make assumptions based on patterns.</p>

<p>An exchange has generally a large amount of transactions. If they use a finite amount of addresses, eventually transactions will reuse existing addresses.</p>

<p>If you provide a tool or a way for people to publicly share/associate specific addresses with Exchanges, then eventually you will build an archive of matches. I believe this is what Etherscan does.</p>
