> ## Documentation Index
> Fetch the complete documentation index at: https://hedera-0c6e0218-mintlify-4a9eb0b1.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# TokenID

> Hedera protobuf reference for the TokenID message, a unique identifier for a Hashgraph token built from shard, realm, and token number components.

A unique identifier for a token.

| Field      | Description                |
| ---------- | -------------------------- |
| `shardNum` | A nonnegative shard number |
| `realmNum` | A nonnegative realm number |
| `tokenNum` | A nonnegative token number |

####