Ethscan allows you to explore all possible private keys and addresses of the Ethereum We list private keys both in compressed and uncompressed WIF format. For each private key we display corresponding public address, current balance, received balance and number of transactions. At the top of the list, you can find total balance and total received balance of all private keys/addresses listed on the page. Also, you can search for a specific private key in decimal, hexadecimal or WIF format or try luck and pick a list of random private keys!
Ethscan.app is a wallet finder with balances in ethereum private key database, automatically scans for private keys with balance of ether or altcoins. When something is found, it will appear in the list under the 'result', if you are lucky you will find one of these: https://etherscan.io/accounts.