> ## Documentation Index
> Fetch the complete documentation index at: https://developers.circle.com/llms.txt
> Use this file to discover all available pages before exploring further.

# CCTP supported blockchains V1

<Warning>
  **This is CCTP V1 (Legacy) version. For the latest version, see [CCTP](/cctp)**.
</Warning>

CCTP V1 is available on the following blockchains where USDC is natively issued,
providing **Standard Transfer** functionality.

**Mainnet:**

* Aptos
* Arbitrum
* Avalanche
* Base
* Ethereum
* Noble
* OP Mainnet
* Polygon PoS
* Solana
* Sui
* Unichain

**Testnet:**

* Aptos Testnet
* Arbitrum Sepolia
* Avalanche Fuji
* Base Sepolia
* Ethereum Sepolia
* Noble Testnet
* OP Sepolia
* Polygon PoS Amoy
* Solana Devnet
* Sui Testnet
* Unichain Sepolia