# Address binary format
Learn more about address
Field order number | Field | Field type | Field size in bytes | Comments |
---|---|---|---|---|
1 | Entity type | Byte | 1 | Value must be 1 |
2 | Chain ID | Byte | 1 | 87 — for Mainnet 84 — for Testnet 83 — for Stagenet |
3 | Account public key hash | Array of bytes | 20 | First 20 bytes of the result of the Keccak256(Blake2b256(publicKey )) hashing function.Here publicKey is the array of bytes of the account public key |
4 | Checksum | Array of bytes | 4 | First 4 bytes of the result of the Keccak256(Blake2b256(data )) hashing function.Here data is the array of bytes of three fields put together:1. Entity type 2. Chain ID 3. Account public key hash |