Token Account

Holds a balance of one specific token for one specific owner. Associated Token Accounts (ATAs) are the standard derivation.

Token Program 165 bytes

Sample: Jupiter USDC

(cached; refreshes hourly · mainnet only)

Sample temporarily unavailable

We couldn’t fetch the cached sample from mainnet right now. The full hex view will try again live.

Try the visualizer

What it is

A Token Account holds one wallet’s balance of one specific token. Every SPL token balance lives in its own 165-byte account.

Why it exists

SPL Token deliberately separates mint metadata (the Mint account) from individual balances (Token Accounts). The same token — say USDC — exists as exactly one Mint and millions of Token Accounts, one per holder. Most wallets use Associated Token Accounts (ATAs): given a wallet pubkey and a mint, the ATA address is the deterministic PDA derived from the pair, so any tool can compute it without on-chain lookup.

Byte layout

Offset	Length	Field	Type	Notes
0	32	`mint`	`Pubkey`	Which token this account holds.
32	32	`owner`	`Pubkey`	Wallet that controls this account (signs transfers).
64	8	`amount`	`u64` LE	Balance in atomic units.
72	36	`delegate`	`COption<Pubkey>`	4-byte tag + pubkey. Approved spender, if any.
108	1	`state`	`u8` enum	`0` Uninitialized, `1` Initialized, `2` Frozen.
109	12	`is_native`	`COption<u64>`	4-byte tag + u64. Set on wrapped-SOL accounts; the u64 is the rent-exempt reserve.
121	8	`delegated_amount`	`u64` LE	Atomic units the delegate may spend.
129	36	`close_authority`	`COption<Pubkey>`	4-byte tag + pubkey. May close this account and reclaim rent.

Total: 165 bytes.

Where you see it

You encounter Token Accounts every time a wallet holds an SPL token — in wallet UIs, transfer instructions, DEX swap routes, and balance lookups. An “account not found” error on a transfer usually means the recipient’s ATA hasn’t been created yet.

Common gotchas

Frozen accounts can still receive tokens. State 2 (Frozen) blocks outgoing transfers but not incoming. Used by issuers like Circle for compliance.
is_native is not a boolean. It’s COption<u64> — when Some, the account is wrapped SOL and the inner u64 is the rent reserve to preserve on close.
ATAs are PDAs of the SPL Associated Token Account program, not of the Token program. The derivation seeds are [wallet, TOKEN_PROGRAM_ID, mint].
A Token Account’s owner is the wallet, not the Token program. The on-chain account’s owner field (in the account header, not these 165 bytes) is the Token program; the data’s owner field is the user wallet that authorizes spends.