> ## Documentation Index
> Fetch the complete documentation index at: https://hedera-0c6e0218-docs-evm-account-model.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# AccountID

The ID for a cryptocurrency account.

| Field        | Type  | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| ------------ | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `shardNum`   | int64 | The shard number (nonnegative)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| `realmNum`   | int64 | The realm number (nonnegative)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| `accountNum` | int64 | A nonnegative account number unique within its realm                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| `alias`      | bytes | The public key bytes to be used as the account's alias. The public key bytes are the result of serializing a protobuf Key message for any primitive key type. Currently only primitive key bytes are supported as an alias (ThresholdKey, KeyList, ContractID, and delegatable\_contract\_id are not supported). At most one account can ever have a given alias and it is used for account creation if it was automatically created using a crypto transfer. It will be null if an account is created normally. It is immutable once it is set for an account. If a transaction auto-creates the account, any further transfers to that alias will simply be deposited in that account, without creating anything, and with no creation fee being charged. |