# eth\_getUncleCountByBlockHash

Returns the number of uncles in a block from a block matching the given block hash.

This method will use `20` [Compute Units](../../about/billing).

***

## Reference: [Here](https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_getunclecountbyblockhash)

## **Parameters**

1. `DATA`, 32 Bytes - hash of a block

```bash
params: ["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"]
```

## Returns

`QUANTITY` - integer of the number of uncles in this block.

```json
// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x1" // 1
}
```

{% tabs %}
{% tab title="mainnet" %}
```bash
curl https://mainnet.avalanche.validationcloud.io/v1/<YOUR_API_KEY_HERE>/ext/bc/C/rpc \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getUncleCountByBlockHash","params":["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"],"id":1}'

```
{% endtab %}

{% tab title="testnet" %}
```bash
curl https://fuji.avalanche.validationcloud.io/v1/<YOUR_API_KEY_HERE>/ext/bc/C/rpc \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getUncleCountByBlockHash","params":["0xb903239f8543d04b5dc1ba6579132b143087c68db1b2168786408fcbce568238"],"id":1}'
```
{% endtab %}
{% endtabs %}

