Pls help me about transfer xcp

I sent 10xcp from counterwallet to poloniex , but already 24hours ago but havent received. How can i check is success or not ?

You can check the transaction on https://xchain.io/
Get the transaction id from counterwallet history.
When the transaction succeeded then it takes additional time at poloniex until they show your xcp.

Transaction is Block Number ?

You can also use the block number. In one block there may be several transactions. Check your tx id.