# Supported Chains

Filebase NFT Backup supports 24+ blockchain networks across EVM and non-EVM ecosystems.

## EVM-Compatible Chains

These chains use Ethereum-style wallet addresses (0x...) and are indexed via the OpenSea API.

| Chain           | Network |
| --------------- | ------- |
| Ethereum        | Mainnet |
| Polygon         | Mainnet |
| Arbitrum        | One     |
| Optimism        | Mainnet |
| Base            | Mainnet |
| Avalanche       | C-Chain |
| BNB Smart Chain | Mainnet |
| Immutable       | X       |
| Ronin           | Mainnet |
| Blast           | Mainnet |
| Sei             | Mainnet |
| Shape           | Mainnet |
| Unichain        | Mainnet |
| Zora            | Mainnet |
| Abstract        | Mainnet |
| Ape Chain       | Mainnet |
| B3              | Mainnet |
| Bera Chain      | Mainnet |
| Gunzilla        | Mainnet |
| HyperEVM        | Mainnet |
| Somnia          | Mainnet |
| Soneium         | Mainnet |

### EVM Wallet Address Format

EVM wallet addresses follow this format:

* Start with `0x`
* Followed by 40 hexadecimal characters
* Example: `0x1234567890abcdef1234567890abcdef12345678`

## Non-EVM Chains

### Solana

Solana NFTs are indexed via the MagicEden API.

**Wallet Address Format:**

* Base58 encoded string
* 32-44 characters long
* Example: `7EcDhSYGxXyscszYEp35KHN8vvw3svAuLKTzXwCFLtV`

### Tezos

Tezos NFTs are indexed via the OBJKT API.

**Wallet Address Format:**

* Starts with `tz1`, `tz2`, or `tz3`
* 36 characters total
* Example: `tz1VSUr8wwNhLAzempoch5d6hLRiTh8Cjcjb`

## Chain Selection Tips

When backing up NFTs:

1. **Know your wallet type**: Different wallets support different chains
2. **One chain at a time**: Each backup request scans a single chain
3. **Check marketplace presence**: NFTs must be indexed by the marketplace API to be discovered

{% hint style="warning" %}
NFTs on chains not listed here cannot currently be backed up through the NFT Backup feature. Contact support if you need a chain added.
{% endhint %}

## Chain-Specific Notes

### Layer 2 Networks

Layer 2 networks (Arbitrum, Optimism, Base, etc.) use the same wallet address as Ethereum mainnet. You'll need to scan each network separately to back up NFTs on each layer.

### Bridge Considerations

NFTs bridged between chains will appear on the destination chain only. The original chain will no longer show the bridged NFT.

### Multi-Chain Collections

Some NFT collections exist across multiple chains. To fully back up such collections, run backups on each chain where you hold NFTs.