# Network info

> Chain IDs, RPC endpoints and explorers for Somnia mainnet and testnet.

## Mainnet

| Parameter | Value |
| --- | --- |
| Network name | Somnia Mainnet |
| Chain ID | `5031` |
| Currency | SOMI |
| RPC | `https://api.infra.mainnet.somnia.network/` |
| WebSocket | `wss://api.infra.mainnet.somnia.network/ws` |
| Explorer | [explorer.somnia.network](https://explorer.somnia.network) |

## Testnet

| Parameter | Value |
| --- | --- |
| Network name | Somnia Testnet |
| Chain ID | `50312` |
| Currency | STT |
| RPC | `https://api.infra.testnet.somnia.network/` |
| WebSocket | `wss://api.infra.testnet.somnia.network/ws` |
| Explorer | [explorer.testnet.somnia.network](https://explorer.testnet.somnia.network) |
| Faucet | [explorer.testnet.somnia.network/faucet](https://explorer.testnet.somnia.network/faucet) |

## Tokyo mainnet

| Parameter | Value |
| --- | --- |
| Network name | Somnia Tokyo |
| Chain ID | `50321` |
| Currency | SOMI |
| RPC | `https://api.tokyo.infra.mainnet.somnia.network` |
| WebSocket | `wss://api.tokyo.infra.mainnet.somnia.network/ws` |
| Explorer | [new.explorer.somnia.network/tokyo](https://new.explorer.somnia.network/tokyo) |

`eth_getLogs` accepts at most 1,000 blocks per query on Tokyo mainnet.

## Tokyo testnet

| Parameter | Value |
| --- | --- |
| Network name | Somnia Tokyo Testnet |
| Chain ID | `50383` |
| Currency | STT |
| RPC | `https://api.hideki.infra.testnet.somnia.network/` |
| WebSocket | `wss://api.hideki.infra.testnet.somnia.network/ws` |
| Faucet | [explorer.testnet.somnia.network/tokyo/faucet](https://explorer.testnet.somnia.network/tokyo/faucet) |

## Regional subchains

Regional subchains run validators in one financial centre for lower latency and connect back to Global. Tokyo is the first on mainnet, live since 29 October 2026. See [Tokyo Subchain](/blockchain/tokyo).

## From code

```ts
import { defineChain } from "viem"

export const somnia = defineChain({
  id: 5031,
  name: "Somnia Mainnet",
  nativeCurrency: { name: "Somnia", symbol: "SOMI", decimals: 18 },
  rpcUrls: { default: { http: ["https://api.infra.mainnet.somnia.network/"] } },
  blockExplorers: { default: { name: "Somnia Explorer", url: "https://explorer.somnia.network" } },
})
```

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