Does GHashIO already have above 51% hashrate?
When blockchain.info says that a block came from an IP address (for example, 88.150.205.243) it means that blockchain.info received this block from this IP address, but it can not determine which pool mined this block.

It also means that blockchain.info is connected with this peer node. There is a high probability that this node has many peers where blocks can come from.

It does not mean that this block was mined by this IP address.