September 2026 OKX Referral Code (OKOFFICIALLY) | Which USDT Deposit Network Should You Use? TRC20 vs ERC20 vs Arbitrum

When depositing USDT to OKX in September 2026, the most important rule is not “which network is cheapest,” but whether the sending network exactly matches the receiving network shown on OKX. If OKX shows Tron, the sending platform must also use Tron. If OKX shows Ethereum, the sender must use Ethereum. If you choose Arbitrum One on OKX, the sending side must also support and select Arbitrum One.

The OKX referral code used in this guide is OKOFFICIALLY. If you do not already have an OKX account, you can register through the OKX OKOFFICIALLY referral link, complete KYC and account security setup, and then proceed with your first USDT deposit.

1. What Is the OKX Referral Code for September 2026?

The OKX referral code used in this article is OKOFFICIALLY. New users can register through the OKX OKOFFICIALLY referral page and confirm the referral information before completing account registration.

Referral rewards and registration promotions can vary by region, account eligibility, and campaign period, so the live registration page remains the final reference for any specific benefit.

2. Why Does USDT Need a Network?

USDT exists on multiple blockchains. This means “USDT” alone does not fully describe what you are sending. You also need to know which blockchain the token is using.

Common USDT networks include:

• Tron
• Ethereum
• Arbitrum One
• Optimism
• Polygon
• Solana
• Avalanche C-Chain
• other networks supported by OKX at the time

The deposit process therefore requires two separate checks:

Asset = USDT
Network = Tron / Ethereum / Arbitrum One / another supported network

If the sending side and OKX use different networks, the deposit may fail to credit normally and asset recovery may not always be possible.

3. What Are TRC20, ERC20 and Arbitrum?

These names refer to different blockchain environments used to move USDT.

On newer OKX interfaces, you may not always see the words “TRC20” or “ERC20.” Instead:

• TRC20 = Tron
• ERC20 = Ethereum
• Arbitrum = Arbitrum One

This naming change does not mean the network has disappeared. OKX may simply display the underlying blockchain name directly.

4. When Should You Use TRC20 / Tron?

Tron is commonly used when transferring USDT between centralized exchanges because it is often fast and relatively inexpensive. If both the sending platform and OKX support Tron, it can be a practical option for many users.

A typical transfer path is:

OKX → Deposit → USDT → Tron → Copy Address → Sending Exchange → Withdraw USDT → Tron/TRC20 → Paste Address → Confirm

However, do not assume Tron is always the cheapest option. The withdrawal fee is usually determined by the sending exchange or wallet, and those fees can change over time.

Before using Tron, check:

• Does the sending platform support Tron?
• Does OKX currently show Tron for USDT deposits?
• What is the withdrawal fee on the sending platform?
• What is the minimum withdrawal amount?
• What is the minimum deposit amount on OKX?

5. When Should You Use ERC20 / Ethereum?

ERC20 USDT means USDT on the Ethereum network. If your USDT is already held on Ethereum, or if the sending platform only supports Ethereum for that withdrawal route, then the OKX receiving side should also be set to Ethereum.

Typical path:

OKX → Deposit → USDT → Ethereum → Copy Address → Sending Platform → Withdraw USDT → Ethereum/ERC20 → Confirm

The main issue with Ethereum is cost. If you are sending from a self-custody wallet, you usually need ETH to pay Ethereum gas. If you are withdrawing from a centralized exchange, the exchange will normally show the withdrawal fee directly.

Another important detail: many EVM-compatible networks use addresses that start with 0x. That does not mean the networks are interchangeable.

An Ethereum address and an Arbitrum address may look identical, but the blockchain route still has to match.

6. When Does Arbitrum One Make Sense?

Arbitrum One is an Ethereum Layer 2 network. It can be especially useful when your USDT is already on Arbitrum or when both the sending platform and OKX support the same Arbitrum One route.

Typical path:

OKX → Deposit → USDT → Arbitrum One → Copy Address → Sending Wallet/Exchange → USDT → Arbitrum One → Confirm

The main advantage is that you may avoid sending the asset back to Ethereum mainnet before depositing to OKX.

For example:

• If your USDT is already on Arbitrum, direct Arbitrum One deposit may be simpler.
• If your USDT is on Tron, moving it to Arbitrum only for the deposit may add unnecessary complexity.
• If your sending exchange does not support Arbitrum One withdrawals, you cannot use the route even if OKX supports it.

7. TRC20 vs ERC20 vs Arbitrum: Which One Should You Choose?

If all three networks are available on both sides, compare them based on your actual transfer situation rather than using one universal rule.

The receiving side on OKX generally does not charge a standard deposit fee, but the sending side may charge a withdrawal or network fee. That fee is dynamic and can differ by exchange, wallet and blockchain conditions.

So statements like “TRC20 always costs 1 USDT” or “ERC20 always costs X USDT” should not be treated as permanent rules.

8. How to Deposit USDT to OKX Step by Step

The correct process is to choose the receiving network on OKX first, then make sure the sending side uses the exact same network.

1. Log in to OKX.
2. Open Assets / Deposit.
3. Select USDT.
4. Review the currently available deposit networks.
5. Select Tron, Ethereum, Arbitrum One, or another supported option.
6. Copy the OKX deposit address.
7. Open the sending wallet or exchange.
8. Select USDT withdrawal or Send.
9. Choose the same network you selected on OKX.
10. Paste the OKX deposit address.
11. Check the withdrawal fee.
12. Check the OKX minimum deposit amount.
13. Verify the address and network again.
14. Confirm the withdrawal.
15. Wait for blockchain confirmations.

If you do not yet have an OKX account, you can register through the OKX OKOFFICIALLY referral page using referral code OKOFFICIALLY, then complete KYC and security setup before depositing.

9. What Happens If You Choose the Wrong USDT Network?

If you have not submitted the transfer yet, stop immediately and select the correct network. If the transaction is already on-chain, do not send another transfer blindly.

Collect the following information:

• Transaction hash / TxID
• Sending address
• OKX deposit address
• Network actually used
• USDT amount
• Transaction time

Then check whether OKX supports that asset on that network and whether the deposit can be recovered. Recovery is not guaranteed in every case.

One common mistake happens with EVM-compatible networks. Ethereum, Arbitrum, Optimism and Polygon may all use similar 0x address formats, but they are still separate blockchains.

10. OKX USDT Deposit Network FAQ

What is the OKX referral code for September 2026?

The OKX referral code used in this guide is OKOFFICIALLY. New users can register through the OKX OKOFFICIALLY referral link.

Why can’t I find TRC20 on OKX?

On some newer OKX interfaces, TRC20 is displayed as Tron. The network itself has not necessarily been removed; OKX may simply use the blockchain name instead of the token-standard label.

Why can’t I find ERC20?

ERC20 USDT is generally shown as Ethereum on newer OKX interfaces.

Does OKX support USDT on Arbitrum?

OKX has supported USDT on Arbitrum One, but network availability can change. Always check the live USDT deposit page before sending funds.

Is TRC20 the same as Tron?

For USDT deposits, TRC20 refers to USDT running on the Tron network. OKX may display this option simply as Tron.

Is ERC20 the same as Ethereum?

For USDT deposits, ERC20 refers to USDT on the Ethereum network. OKX commonly displays the network as Ethereum.

Is TRC20 always cheaper than ERC20?

Not necessarily. Tron is often cheaper in practice, but the actual withdrawal fee depends on the sending platform and current network conditions. Compare the fee shown at the moment you make the transfer.

Does OKX charge a USDT deposit fee?

OKX generally does not charge a standard receiving-side deposit fee, but the sending exchange or wallet may charge a withdrawal/network fee. Also check the minimum deposit requirement.

Can I send USDT from Binance to OKX using Arbitrum?

Yes, but only if both Binance withdrawal and OKX deposit currently support the same Arbitrum One USDT network. Never check only one side.

If the deposit address looks the same, can I use any network?

No. Similar address formats do not make blockchains interchangeable. The network on the sending side must match the network selected on OKX.

In September 2026, the easiest way to choose an OKX USDT deposit network is to follow one rule: first find a network supported by both the sending side and OKX, then compare fees, speed and your current asset location. Tron is commonly used for exchange transfers, Ethereum makes sense when the USDT is already on Ethereum, and Arbitrum One can be efficient when your funds are already on that Layer 2.

If you do not yet have an OKX account, you can register through the OKX OKOFFICIALLY registration link using referral code OKOFFICIALLY. After KYC and security setup, open the live USDT deposit page and verify the currently available Tron, Ethereum, Arbitrum One or other supported networks before transferring funds.