---
title: "eth_chainId"
description: "Returns the EIP-695 chain ID for the connected Base network — 0x2105 for Mainnet and 0x14a34 for Sepolia."
source: https://basehub.org/api-reference/eth/eth_chainid/
---
Returns the chain ID of the current network, per [EIP-695](https://eips.ethereum.org/EIPS/eip-695).

## Parameters

None.

## Returns

| Field | Type | Description |
| --- | --- | --- |
| `result` | string | The chain ID as a hexadecimal string. `"0x2105"` (8453) for Base Mainnet and `"0x14a34"` (84532) for Base Sepolia. |

## Example

### Request

```json
{
  "jsonrpc": "2.0",
  "method": "eth_chainId",
  "params": [],
  "id": 1
}
```

### Response

Base Mainnet:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x2105"
}
```

Base Sepolia:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x14a34"
}
```