Many Ethereum wallets require you to add custom tokens to see your balance. To quickly check your token holdings, you can enter your ETH address into a blockchain explorer, which will display all available tokens under “Token Balances.” To add a custom token to wallets like MetaMask or MyEtherWallet, you will need the token’s contract address and the number of decimal places, which can typically be found by searching the token’s ticker on a blockchain explorer.