# getChainId

Returns the chain ID associated with the current network

## Usage

:::code-group
```ts twoslash [example.ts]
import { publicClient } from './client'

const chainId = await publicClient.getChainId() // [!code focus:99]
// @log: 1
```

```ts [client.ts] filename="client.ts"
import { createPublicClient, http } from 'viem'
import { mainnet } from 'viem/chains'

export const publicClient = createPublicClient({
  chain: mainnet,
  transport: http()
})
```
:::

## Returns

`number`

The current chain ID.

## JSON-RPC Method

* Calls [`eth_chainId`](https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_chainid).