Following addresses are marked for Double Spending :-

1. https://blockchain.info/address/1AF4og9Epgw7Q7hVzNeDf8ZAvzRhJ8pQG

2. https://blockchain.info/address/1H5NvB7W5hGhf3aPACDZPam7vmy3bYuTDa

3. https://blockchain.info/address/1BX5YoLwvqzvVwSrdD4dC32vbouHQn2tuF

4. https://blockchain.info/address/1BwZeHJo7b7M2op7VDfYnsmcpXsUYEcVHm

5. https://blockchain.info/address/1A73ExsM2doRwTLp82rv5U36QHbBFmHD1X


现在CEX.IO的算力已经下降到44%左右 但仍是比较大的份额
https://blockchain.info/pools